Genesis 29:31-35

When the Lord saw that Leah was unloved, He opened her womb; but Rachel was barren. So Leah conceived and bore a son, and she called his name Reuben; for she said, “The Lord has surely looked on my affliction. Now therefore, my husband will love me.” Then she conceived again and bore a son, and said, “Because the Lord has heard that I am unloved, He has therefore given me this son also.” And she called his name Simeon. She conceived again and bore a son, and said, “Now this time my husband will become attached to me, because I have borne him three sons.” Therefore his name was called Levi. And she conceived again and bore a son, and said, “Now I will praise the Lord.” Therefore she called his name Judah. Then she stopped bearing.

1 John 4:19

We love Him because He first loved us.