Bonaventure — on Gen 1:9 (Breviloquium, Prologue)

“The third age, in which Abraham was called, and the synagogue was begun, which was to bear fruit and generate offspring for the worship of God, corresponds to the third day, on which the earth appeared and brought forth green plants. The third age is called adolescence, because, just as the generative power then begins to pass into its act, so then Abraham was called, and circumcision was given to him, and the promise concerning the seed was made.”