וַיֹּ֣אמֶר שַׁלְּחֵ֔נִי כִּ֥י עָלָ֖ה הַשָּׁ֑חַר וַיֹּ֙אמֶר֙ לֹ֣א אֲשַֽׁלֵּחֲךָ֔ כִּ֖י אִם־בֵּרַכְתָּֽנִי׃
And he said: ‘Let me go, for the day breaketh.’ And he said: ‘I will not let thee go, except thou bless me.’
Read halakhic rulings (Jewish law) on Genesis 32:27: and classical halakhic sources.