Exodus 4:20

And Moses took his wife and his sons, and set them upon an ass, and he returned to the land of Egypt: and Moses took the rod of God in his hand.

Took ... wife, and ... sons, and set them upon an ass - Septuagint, 'asses.' Those animals are not now used in the desert of Sinai, except by the Arabs for short distances.

Returned - entered on his journey toward Egypt.

Rod of God - so called from its being to be appropriated to his service, and because whatever miracles it might be employed in performing, would be done not by its inherent properties, but by a divine power following on its use (cf. Acts 3:12).