Rashi on Genesis 32:23/רש"י על בראשית ל״ב:כ״ג

1ואת אחד עשר ילדיו AND HIS ELEVEN CHILDREN — But where was Dinah? He placed her in a chest and locked her in so that Esau should not set his fancy upon her (desire to marry her). On this account Jacob was punished — because he had kept her away from his brother for she might have led him back to the right path; she therefore fell into the power of Shechem (Genesis Rabbah 76:9).

2יבק JABBOK — the name of the river.