exodus 2:5 And the daughter of Pharaoh came down to wash herself at the river; and her maidens walked along by the river's side; and when she saw the ark among the flags, she sent her maid to fetch it. - Free Bible Online

      5. the daughter of Pharaoh came down to wash herself at the river--The occasion is thought to have been a religious solemnity which the royal family opened by bathing in the sacred stream. Peculiar sacredness was attached to those portions of the Nile which flowed near the temples. The water was there fenced off as a protection from the crocodiles; and doubtless the princess had an enclosure reserved for her own use, the road to which seems to have been well known to Jochebed.
      walked along--in procession or in file.
      she sent her maid--her immediate attendant. The term is different from that rendered "maidens."

JFB.