Genesis 33:1
When Jacob looked off in the distance, there was Esau coming toward him, accompanied by 400 men! So Jacob divided Leah's children, Rachel, and the children of the two servants into separate groups.
Genesis 27:41-42
So Esau harbored animosity toward Jacob because of the way his father had blessed him. Esau kept saying to himself, "The time to mourn for my father is very near. That's when I'm going to kill my brother Jacob."
Genesis 32:6-7
Later, the messengers returned to Jacob and reported, "We went to your brother Esau. He's now coming to meet you and he has 400 men with him!"
Genesis 32:16
He entrusted them into the care of his servants, one herd at a time. Then he told his servants, "Go in front of me, making sure there's plenty of space between herds."