Commentary for Numbers 25:12

את בריתי שלום [I GIVE TO HIM] MY COVENANT — PEACE — This means: I give him my covenant that it should be to him as a covenant of peace; just like a man who shows gratitude and friendliness to one who has done him a kindness. So here, too, the Holy One, blessed be He, expressed to him His peaceful feelings towards him.

את בריתי שלום. Peace with the angel of death. We have a similar meaning of this word שלום in Job 25,20 עושה שלום במרומיו, “He makes peace in His lofty regions.” [I assume that the reference is to the fact that the angel of death has no authority in the celestial regions. Ed.] Losses occur only as a result of confrontations by opposites. We find that as a result of this שלום, “peace, or armistice” with the angel of death Pinchas enjoyed an exceedingly long life on earth, more so than any other member of his generation. In fact, he was still serving as priest in the Tabernacle at Shiloh during the civil war between Binyamin and the other tribes. This occurred many years after the death of Joshua and the elders who were Joshua’s assistants. (Judges 20,28) Joshua 24,26 reports these elders as surviving Joshua for many years. If, as is indicated by the Talmud, Pinchas was still alive in the days of Yiphtach (Judges 11,26) he must have been 300 years old by that time. (compare either Bereshit Rabbah 60,3 or Pirke de Rabbi Eliezer chapter 47 on the subject of Pinchas)

לכן אמור, "Therefore, 'say,'" etc. Why did the Torah have to write the word לכן, "Therefore," seeing it goes on to explain in verse 13 "because he was jealous for his G'd?" We are forced to understand the word as an oath. We have learned in Shemot Rabbah 6,4 on Exodus 6,6 that this word is always to be understood as a form of oath. The Midrash uses as its source Samuel I 3,14, ולכן נשבעתי לבית עלי, "And this is why I have sworn an oath concerning the house of Eli, etc." This still leaves us with the question why an oath was required in this instance. Presumably, the oath was needed to reinforce the covenant of peace in the event that Pinchas' children should turn out not to be deserving of the covenant G'd had concluded with their father.