וּבְנֵי־קֹ֖רַח לֹא־מֵֽתוּ׃ (ס)
Porém os filhos de Korach não morreram. {ס}
Rashi
of the sons of Korah Assir, Elkanah, and Abiasaf. At first, they were in their father’s counsel, but at the time of the controversy they parted, and when all those around them were swallowed up, and the earth opened its mouth, their place was left within the mouth of the earth, as the matter that is stated (Num. 26:11): “But the sons of Korah did not die.” There they uttered a song, and there they composed these psalms. [Then] they ascended from there, and the holy spirit rested on them, whereupon they prophesied concerning the exiles, the destruction of the Temple, and the Davidic dynasty.
Rabbeinu Bahya
Please remember that Yitzchak’s “exile” was different from his father’s. Avimelech did not rob him of his wife. He only lived in fear that this might happen, fear being one of the hallmarks of living in exile. At the beginning, as soon as Yitzchak arrived, Avimelech had issued instructions that no one should dare harm Yitzchak (verse 11), whereas ultimately he expelled him from his country (verse 16). Eventually, the same people who had expelled him sought an alliance with Yitzchak. This is very similar to the experience of the Jewish people during the Babylonian exile. The exile commenced due to the terrors of hunger (Lamentations 5,10). During the Jews’ stay in Babylon they were not oppressed, and many of them rose to positions of great influence. Finally, [after the Babylonians had themselves become vassals of the Persians, Ed.] King Coresh proclaimed that they were free to return to their homeland and gave them money and a military escort to protect them on the way (Ezra 1,3). He even warned the surrounding kingdoms not to molest the returning Jews (Ezra chapter 4 and Daniel chapter 7).
Rabbeinu Bahya
אשר תביא, “which you are to bring;” if someone has set aside his bikkurim in order to bring them to the Temple and they have been lost or stolen he is liable for replacing them; We derive this from the text here where the word תביא implies a personal obligation for the owner to present this fruit to the priest in the Temple. It is one of the few commandments which cannot be performed by means of a “messenger, שליח, the task cannot be delegated. If at the time of taking the fruit from the tree the farmer had made a condition saying that he would delegate the task of transporting this fruit to the Temple such a condition is acceptable (Maimonides Hilchot Bikkurim 2,21).
Farmers living in the proximity of Jerusalem, must bring fresh grapes or figs as their bikkurim, whereas those living far away may bring dried grapes or dried figs instead. Bikkurim are not to be presented in the Temple before the festival of Shavuot, seeing the Torah wrote (Exodus 23,16) “the festival of cutting (grain harvest) the time of the bikkurim of your labor.” If a farmer did bring his bikkurim before that date the priest does not accept them but they have to remain in escrow until that festival and only at that time can they be designated as bikkurim (Maimonides Hilchot Bikkurim 25-6). Concerning such situations the Torah writes in verse 11 of our chapter: “you shall rejoice with all the goodness, etc.,” etc., i.e. that the time of year when bikkurim are acceptable is the season when people are happy seeing that they started bringing in the year’s harvest. Traditionally, this period extends from the festival of Shavuot through the end of the harvest season. If the bringing of the bikkurim occurs later than the festival of Sukkot, the offering is accepted but the accompanying scriptural verses may not be recited (Sifri Ki Tavo item 297).
Farmers living in the proximity of Jerusalem, must bring fresh grapes or figs as their bikkurim, whereas those living far away may bring dried grapes or dried figs instead. Bikkurim are not to be presented in the Temple before the festival of Shavuot, seeing the Torah wrote (Exodus 23,16) “the festival of cutting (grain harvest) the time of the bikkurim of your labor.” If a farmer did bring his bikkurim before that date the priest does not accept them but they have to remain in escrow until that festival and only at that time can they be designated as bikkurim (Maimonides Hilchot Bikkurim 25-6). Concerning such situations the Torah writes in verse 11 of our chapter: “you shall rejoice with all the goodness, etc.,” etc., i.e. that the time of year when bikkurim are acceptable is the season when people are happy seeing that they started bringing in the year’s harvest. Traditionally, this period extends from the festival of Shavuot through the end of the harvest season. If the bringing of the bikkurim occurs later than the festival of Sukkot, the offering is accepted but the accompanying scriptural verses may not be recited (Sifri Ki Tavo item 297).
Rashi
רב לכם בני לוי means, “It is a great (an important) thing that I have told you, ye sons of Levi”). But were they not fools in that although he so sternly warned them they nevertheless undertook to offer! They, however, sinned against their own souls (i.e., they were regardless of their lives) as it is said, (17:3) “the censers of these sinners against their souls”. — But Korah who certainly was a clever (lit., open-eyed) man, what reason had he to commit this folly? His mind’s eye misled him. He saw by prophetic vision a line of great men (more lit., a great chain) descending from him, amongst them the prophet Samuel who was equal in importance to Moses and Aaron together (cf. Psalms 99:6: משה ואהרן בכהניו ושמואל בקראי שמו), and he said to himself, “On his account I shall escape the punishment”. And he further saw twenty-four Mishmars (shifts of Levites who formed the Temple Choir) arising among his grand-children, all of them prophesying by the Holy Spirit, — as it is said, (I Chronicles 25:5) “All these (prominent musicians) were sons of Heiman” (Heiman was a descendant of Korah; cf. I Chronicles 6:18—23). — He said, “Is it possible that all this dignity is to arise from me and I shall remain silent (be myself of no importance)?” On this account he joined the others in order to attain to that prerogative, because he had indeed heard from the mouth of Moses that all else of them would perish and one would escape: "He whom the Lord will choose will be holy". He mistakenly applied this to himself. But he had not seen correctly, for his sons repented of their rebellious attitude and therefore did not die at that time (cf. Numbers 26:11), and it was from them that Samuel and the Levitical singers were descended. Moses, however, foresaw this. (Midrash Tanchuma, Korach 5).