Musar к Бамидбар 25:12

The missing letter ו in the name of Jacob, (which is usually written defective), was added to the name ו-יוסף, on occasions such as in Exodus 1,5 (or altogether, since that name too could have been spelled defective). The "small" ו in the word שלום, Numbers 25,12, alludes to another verse in Zachariah 8, 19: והאמת והשלום אהבו "and the truth and the peace they loved." The attribute which distinguishes Jacob is אמת, truth, whereas the attribute הברית השלום is the one that distinguishes Joseph. The Zohar has already explained how the terms ברית and גוף overlap (cf. Sullam edition Lech Lecha page 134-135). We name something or somebody because we desire the name to reveal their nature. Joseph was the "revelation" of the mystical dimension of Jacob, the secret of how the covenant between G–d and man influences the ability of determining the nature of him who is about to be born.

Moses was jealous of the Egyptian, as it is said, "And he smote the Egyptian" (Exod. 2:12). And so we find in the case of Elijah, when he said, "I have been very jealous for the Lord, the God of hosts, for the children of Israel have forsaken Thy covenant" (I Kings 19:10). And so is it said, "In that he was very jealous for My sake among them" (Num. 25:11), and the Lord, may He be Blessed, gave him his reward for this as it is said : "Behold, I give unto him My covenant of peace!" (Num. 25:12). And it is said, "… Ye shall not be afraid of any man …" (Deut. 1:17). Now he who reveres the Lord, may He be Blessed, will gladly offer his life for the sanctification of God's name. As it is said, "Whoso is on the Lord's side, let him come unto me. And all the Levites rallied to him" (Exod. 32:26), and it is further said, "And when Phinehas, the son of Eleazar, the son of Aaron the priest, saw it, he rose up from the midst of the congregation, and took a spear in his hand" (Num. 25:7).