And Isaac's servants dug in the valley, and found there a well of springing water.
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Ambrose of Milan
AD 397
For Abraham dug wells and Isaac too—that is, the mighty patriarchs—and Jacob also, as we find in the Gospel, as if they were fountains of the human race, and specifically fountains of faith and devotion. For what is a well of living water but a depth of profound instruction? On this account Hagar saw the angel by a well and Jacob found his wife Rachel by a well; Moses too earned the first rewards of his future marriage beside a well. Therefore Isaac undertook to open wells out of a depth of vision and in good order, so that the water of his well might first wash and strengthen the reasoning faculty of the soul and its eye, to make its sight clearer. Isaac, or the Soul
Torrent. That is, a channel where sometimes a torrent, or violent stream, had run. (Challoner)
In this vale of Gerara, a never-failing spring was found. (Haydock)