Genesis 33:1
Jacob saw Esau coming with his four hundred men. Therefore he divided the children among Leah, Rachel, and the two concubines.
Genesis 27:41-42
So Esau bore a grudge against Jacob because of the blessing with which his father had blessed him. Esau said to himself: The days of mourning for my father are near. Then I will kill my brother Jacob.
Genesis 32:6-7
When the messengers returned to Jacob, they said: We went to your brother Esau. He is already on his way to meet you. He has four hundred men with him.
Genesis 32:16
He placed servants in charge of each herd. He said to his servants: Go ahead of me, and maintain a distance between the herds.