Rashi, on Gen 31:38

“Have I therefore been with thee twenty years? thy ewes and goats were not barren, the rams of thy flocks I did not eat:”

“לא שכלו means HAVE NOT MISCARRIED — Similar are: (Hosea 9:14) ‘‘a miscarrying (משכיל) womb”; (Job 21:10) “his cow calveth and casteth (תשכל) not her calf”. ואילי צאנך AND THE RAMS OF THY FLOCK — From this phrase they (the Rabbis) inferred (Bava Kamma 65b) that a male sheep even when one day old is called a ram; for if this be not so, how was this creditable to him? Did he mean that he had not eaten rams (i. e. the larger animals), but that he had eaten the smaller sheep? If so, he was a thief! (39).”

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