וַיִּקְרָ֥א יַעֲקֹ֖ב אֶל־בָּנָ֑יו וַיֹּ֗אמֶר הֵאָֽסְפוּ֙ וְאַגִּ֣ידָה לָכֶ֔ם אֵ֛ת אֲשֶׁר־יִקְרָ֥א אֶתְכֶ֖ם בְּאַחֲרִ֥ית הַיָּמִֽים׃
At tinawag ni Jacob ang kanyang mga anak na lalaki, at sinabi: “Magtipon kayo, at sasabihin ko sa inyo ang mangyayari sa inyo sa katapusan ng mga araw.
Rashi
ואגידה לכם THAT I MAY TELL YOU — He wished to reveal to them the end of Israel’s exile but the Shechinah departed from him and he began to speak of other things (Genesis Rabbah 98:2).
Ba'al HaTurim
Then Yaakov called for his son's: He sought to reveal the appointed time for the end but it became concealed from him (Pesachim 56a.) Yaakov asks, "Perhaps there is sin (חטא) among you?" They said, "No, if you examine our names, you will not find the letters ח or ט in them. Then he said unto them, "Arise, there is also no ק or ץ letters (end) in them.
Chizkuni
אשר יקרא אתכם, “what is going to happen to you;” here Yaakov intends to foretell the future; these were not meant to be blessings, as we do not find that he blessed Reuven, Shimon, and Levi. When the Torah writes in verse 28 of this chapter: וזאת אשר דבר להם אביהם, “and this is what their father had said to them,” (followed by “their father blessed them”) we have to understand that verse as follows: “this was what he foretold them.” The details of his blessing were not spelled out by the Torah.