Genesis 29:30-31

29:30 Jacob had marital relations with Rachel as well. He loved Rachel more than Leah, so he worked for Laban for seven more years.

The Family of Jacob

29:31 When the Lord saw that Leah was unloved, he enabled her to become pregnant while Rachel remained childless.

Deuteronomy 21:15-16

Laws Concerning Children

21:15 Suppose a man has two wives, one whom he loves more than the other, and they both bear him sons, with the firstborn being the child of the less loved wife. 21:16 In the day he divides his inheritance he must not appoint as firstborn the son of the favorite wife in place of the other wife’s son who is actually the firstborn.

Luke 14:26

14:26 “If anyone comes to me and does not hate his own father and mother, and wife and children, and brothers and sisters, and even his own life, he cannot be my disciple.