וַיֹּ֣אמֶר שַׁלְּחֵ֔נִי כִּ֥י עָלָ֖ה הַשָּׁ֑חַר וַיֹּ֙אמֶר֙ לֹ֣א אֲשַֽׁלֵּחֲךָ֔ כִּ֖י אִם־בֵּרַכְתָּֽנִי׃
And he said: Let me go, for the dawn has risen. And he said: I will not let you go unless you have blessed me.
Torah Temimah points to Chullin 91b.
ויאמר שלחני כי עלה השחר — א"ל: גנב אתה או קוביוסטוס אתה, שאתה מתיירא מן השחר?
“And he said: Let me go, for the dawn has risen.” He said to him: Are you a thief or a gambler, that you fear the dawn?
The Gemara records Yaakov’s challenge to the angel’s urgency to depart at daybreak.
Derash on the dialogue (Bavli).
Yaakov pressed the angel for a blessing before releasing him at dawn.