And her two sons. That Zipporah had borne Moses at least two sons before his return to Egypt from Midian, had appeared from Exodus 4:20. The name of the one, Gershom, and the ground of it, had been declared in Exodus 2:22.
The repetition here may be accounted for by the present chapter having been originally a distinct and separate composition, written on a distinct roll, and subsequently incorporated by Moses into his great work.