NET
34 The Reubenites and Gadites named the altar, “Surely it is a Reminder to us that the Lord is God.”
Darby
34 And the children of Reuben and the children of Gad gave a name to the altar; for it is a witness between us that Jehovah is God.
KJV
34 And the children of Reuben and the children of Gad called the altar [Ed]: for it [shall be] a witness between us that the LORD [is] God.