Exodus 2:5

And the daughter of Pharaoh came down to wash herself at the river, for such bathing in the open stream accords well with the customs of ancient Egypt; and her maidens, the attending slaves, walked along by the river's side; and when she saw the ark among the flags, she sent her maid to fetch it. The other maids being engaged in patrolling the neighborhood against any disturbance, the attendant of the princess was sent to get the chest which had aroused the curiosity of Pharaoh's daughter.