Genesis 32:6-8

When the messengers returned to Jacob, they said, “We went to your brother Esau, and now he is coming to meet you, and four hundred men are with him.” In great fear and distress Jacob divided the people who were with him into two groups, and the flocks and herds and camels as well. He thought, “If Esau comes and attacks one group, the group that is left may escape.”