וַיֶּאֱהַ֥ב יִצְחָ֛ק אֶת־עֵשָׂ֖ו כִּי־צַ֣יִד בְּפִ֑יו וְרִבְקָ֖ה אֹהֶ֥בֶת אֶֽת־יַעֲקֹֽב׃
Now Isaac loved Esau, because he did eat of his venison; and Rebekah loved Jacob.
Read halakhic rulings (Jewish law) on Genesis 25:28: and classical halakhic sources.