YITZCHAK AVINU'S PLAN TO SAVE EISAV

The OHR HACHAYIM HAKADOSH points out that the Torah specifically tells us that our holy Patriarch YITZCHOK AVINU developed a plan to WIN BACK his rebellious son Eisav.... Can you guess what it was? Curfew? Rules? Consequences? Contracts? Family Therapy? What could POSSIBLY turn such a deviant child around?