אליגוריות החוקים, ספר ג ע״בAllegorical Interpretation of Genesis, Book III 72
א׳
1[203] Now as for sense God has appointed all woeful things in larger measure, so on the earnest soul has He bestowed without stint an abundance of good things. For example in the case of perfect Abraham He speaks in this wise: “By Myself I have sworn, saith the Lord, for Whose sake thou hast done this thing, and on My account hast not spared thy son, thine only son, verily blessing will I bless thee, and multiplying will I multiply thy seed as the stars of heaven and as the sand which is by the sea shore” (Gen. 22:16 f.). Good is it both that He confirmed the promise by an oath, and that He did so by an oath befitting God; you mark that God swears not by some other thing, for nothing is higher than He, but by Himself, who is best of all things.
ב׳
2[204] Some have said, that it was inappropriate for Him to swear; for an oath is added to assist faith, and only God and one who is God’s friend is faithful, even as Moses is said to have been found “faithful in all His house” (Numb. 12:7). Moreover, the very words of God are oaths and laws of God and most sacred ordinances; and a proof of His sure strength is that whatever He saith cometh to pass, and this is specially characteristic of an oath. It would seem to be a corollary from this that all God’s words are oaths receiving confirmation by accomplishment in act.