Deuteronomy 2:13

Now rise up, said I, and get you over the brook Zered
It is called the valley of Zered, ( Numbers 21:12 ) , the word used signifying both a valley and a brook; and it is very probable there were both a valley and a brook of the same name; it must be near Dibongad, since in one place it is said the Israelites came from Ijim and pitched in Zered; and in another place that they came from thence, and pitched in Dibongad, ( Numbers 21:11 Numbers 21:12 ) and Nu 33:45

and we went over the brook Zered;
which was fordable, or perhaps at this time dried up.