English: Abaye said: Is everyone then Yaakov our father, of whom it is written “my might and the first-fruits of my strength” — that he never saw an emission of seed in his days!
On the daf / in context: The Gemara is discussing physical signs of fertility. Abaye cites the verse to note that Yaakov was exceptional in never having experienced a nocturnal emission prior to the conception of Reuven.
Type of Learning
Derash on the verse (Bavli sugya) — the language “first of my strength” is taken as evidence of Yaakov’s unique purity in this regard.
What Is Learned
Yaakov never experienced a nocturnal emission before the birth of Reuven; the verse is the source for that tradition.