Deuteronomy 2:13 (ESV)

13 ‘Now rise up and go over the brook Zered.’ So we went over the brook Zered.

Israel was called to cross over the brook Zered, whose precise location is uncertain, though it seems to have made up the northern boundary of Edom and the southern boundary of Moab. Israel's compliance here is a contrast to the disobedience connected to Kadesh-barnea