George Leo Haydock, on Gen 17:1

“And after he began to be ninety and nine years old, the Lord appeared to him: and said unto him: I am the Almighty God: walk before me, and be perfect.”

“Walk, &c. by assiduous meditation and advancement in virtue. This apparition was to inform Abram, that the promised seed should be born of Sarai. (Haydock)”

Imported from an open dataset — not yet checked against the printed edition.