When Jacob left the home of his father Isaac, he was fleeing his brother Esau, headed to Laban's home, seeking a bride. On the road, at night, he had a dream in which God stood at the top of a long ramp and repeated the promises made previously to Abraham and Isaac. Later Jacob, fleeing Laban, headed back to Canaan and toward Seir. (Mount Seir, traditionally the home of the Edomites, is in southwest Jordan, east and south of Jerusalem. See this Wikipedia page.) Jacob is retracing a path he took twenty years before.
Jacob sent messengers ahead of him to his brother Esau in the land of Seir, the country of Edom. He instructed them: "This is what you are to say to my master Esau: `Your servant Jacob says, I have been staying with Laban and have remained there till now. I have cattle and donkeys, sheep and goats, menservants and maidservants. Now I am sending this message to my lord, that I may find favor in your eyes.'"
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."
The Hebrew word machaneh (מַחֲנֶה) means "camp". The NIV translates that word as "group" here but it is essentially the same word as Mahanaim, above. So the concept of "two camps" (Mahanaim) continues.
Genesis 32:9-12, But You promised!
"Save me, I pray, from the hand of my brother Esau, for I am afraid he will come and attack me, and also the mothers with their children. But you have said, `I will surely make you prosper and will make your descendants like the sand of the sea, which cannot be counted.'"
Throughout the book of Genesis, there is a certain honest selfishness in the way humans deal with God. I find this refreshing.
He instructed the one in the lead: "When my brother Esau meets you and asks, `To whom do you belong, and where are you going, and who owns all these animals in front of you?' then you are to say, `They belong to your servant Jacob. They are a gift sent to my lord Esau, and he is coming behind us.'"
He also instructed the second, the third and all the others who followed the herds: "You are to say the same thing to Esau when you meet him. And be sure to say, `Your servant Jacob is coming behind us.'" For he thought, "I will pacify him with these gifts I am sending on ahead; later, when I see him, perhaps he will receive me."
Then the man said, "Let me go, for it is daybreak."
But Jacob replied, "I will not let you go unless you bless me."
The man asked him, "What is your name?"
"Jacob," he answered.
Then the man said, "Your name will no longer be Jacob, but Israel, because you have struggled with God and with men and have overcome."
Jacob said, "Please tell me your name."
But he replied, "Why do you ask my name?" Then he blessed him there.
Genesis 32:30-32, Jacob limps
The sun rose above him as he passed Peniel, and he was limping because of his hip. Therefore to this day the Israelites do not eat the tendon attached to the socket of the hip, because the socket of Jacob's hip was touched near the tendon.
The last verse offers a tribal instruction for remembering this event.