וַיִּגְנֹ֣ב יַעֲקֹ֔ב אֶת־לֵ֥ב לָבָ֖ן הָאֲרַמִּ֑י עַל־בְּלִי֙ הִגִּ֣יד ל֔וֹ כִּ֥י בֹרֵ֖חַ הֽוּא׃
And Jacob outwitted Laban the Aramean, in that he told him not that he fled.
Read halakhic rulings (Jewish law) on Genesis 31:20: and classical halakhic sources.