Ibn Ezra on Numbers 25:12:1

את בריתי שלום. טעמו את בריתי ברית שלום כמו כסאך אלהים ורבים כן והטעם שלא יגור מאחי זמרי כי הוא נשיא בית אב ושכרו שתהיה לו ולזרעו אחריו ברית כהונת עולם ונצח כי הכהנים הגדולים היו מבני פינחס ויתכן שהיו בנים אחרים לאלעזר: MY COVENANT OF PEACE. The meaning of beriti shalom (My covenant of peace) is:¹⁹The literal meaning of beriti shalom is: My covenant peace. “Of” is not in the Hebrew text. Hence I.E.’s comment. My covenant, a covenant of peace.²⁰In other words, beriti shalom should be read as if written beriti, berit shalom. Compare, Thy throne God²¹Translated literally. (Ps. 45:7).²²Which should be read as if written, Thy throne, throne of God. See I.E. on Num. 12:6. There are many such cases.²³Where a word is missing in the Biblical text and has to be supplied by the reader. Its meaning is that Phinehas should not fear the brothers of Zimri for Zimri²⁴Who came from a powerful family which might avenge his death. was a prince of a father’s house (v. 14). Phinehas was rewarded with the covenant of priesthood for himself and his seed forever, for all the high priests were descendants of Phinehas. It is possible that Eleazar²⁵Who served as high priest after the passing of Aaron. See Num. 20:22-29. had other sons.²⁶The high priesthood would in any case have been passed on through Phinehas.