When Abraham [was able] to see what he was to see, [he] circumcised the flesh of the foreskin, thus teaching us that it is necessary to destroy the flesh.

(21) This day is salvation come to this house, forasmuch as he also is a son of Abraham.

(1) As then in astronomy we have Abraham as an instance, so also in arithmetic we have the same Abraham. "For, hearing that Lot was taken captive, and having numbered his own servants, born in his house, 318 (tih)," he defeats a very great number of the enemy.

(4) After that our father Abraham had seen, and pondered over, investigated, and understood these things, he designed, engraved, and composed them, and received them into his power (hands). Then the Lord of all appeared unto him, made a covenant with him, and kissed his head, and naming him after his own name, called him his friend; and as it is written, completed a covenant with him and with his seed forever, who then believed on God, the Tetragrammaton, and it was imputed to him for righteousness. God ordained a covenant between the toes of his feet, that of circumcision; and a covenant between the fingers of his hands, that of the Tongue. He bound the essences of the twenty-two letters on his tongue, and God disclosed to him the secrets of them. God has carried these through waters, He has borne them aloft through fire, and He has stamped them in the storms of the air; He has distributed them among the seven stars, and has assigned them to twelve celestial constellations. Amen.

(5) "Wherefore thus saith the Lord, Every alien son is uncircumcised in heart, and uncircumcised in flesh" (that is, unclean in body and soul): "there shall not enter one of the strangers into the midst of the house of Israel, but the Lerites." He calls those that would not believe, but would disbelieve, strangers. Only those who live purely being true priests of God. Wherefore, of all the circumcised tribes, those anointed to be high priests, and kings, and prophets, were reckoned more holy. Whence He commands them not to touch dead bodies, or approach the dead; not that the body was polluted, but that sin and disobedience were incarnate, and embodied, and dead, and therefore abominable.

(104) 10. When the Patriarch Abraham had comprehended the great truths, meditated upon them, and understood them perfectly, the Lord of the Universe (the Tetragrammaton) appeared to him, called him His friend, kissed him upon the head, and made with him a covenant. First, the covenant was between the ten fingers of his hands, which is the covenant of the tongue (spiritual); second, the covenant was between the ten toes of his feet, which is the covenant of circumcision (material); and God said of him, "Before Abraham bound the spirit of the twenty-two letters (the Thora) upon his tongue and God disclosed to him their secrets. God permitted the letters to be immersed in water, He burned them in the fire and imprinted them upon the winds. He distributed them among the seven planets and gave them to the twelve zodiacal signs.