Numbers 21:18
The princes digged the well, the nobles of the people digged it, by the direction of the lawgiver, with their staves. And from the wilderness they went to Mattanah:
Cross-references
Numbers 20:8
Parallel
Numbers 20:8 also involves provision of water — Moses striking the rock. Here water comes from a dug well. Both show God's provision.
Nehemiah 3:5
Contrast
Nehemiah 3:5 contrasts nobles who refused to work with the nobles in Numbers who diligently dug the well — opposite attitudes toward service.