New Revised Standard Version
The Reubenites and the Gadites called the altar Witness; “For,” said they, “it is a witness between us that the LORD is God.”

Contemporary English Version
The people of Reuben and Gad named the altar "A Reminder to Us All That the LORD Is Our God."

New American Bible
The Reubenites and the Gadites gave the altar its name as a witness among them that the LORD is God.

Douay-Rheims Bible
And the children of Ruben, and the children of Gad called the altar which they had built, Our testimony, that the Lord is God,

And the children of Ruben, and the children of Gad called the altar which they had built, Our testimony, that the Lord is God,

Ed.

Joshua 22:27 But for a testimony between us and you, and our posterity and yours, that we may serve the Lord, and that we may have a right to offer both holocausts, and victims and sacrifices of peace offerings: and that your children to morrow may not say to our children: You have no part in the Lord.

Joshua 24:27 And he said to all the people: Behold this stone shall be a testimony unto you, that it hath heard all the words of the Lord, which he hath spoken to you: lest perhaps hereafter you will deny it, and lie to the Lord your God.

1 Kings 18:39 And when all the people saw this, they fell on their faces, and they said: The Lord, he is God; the Lord, he is God.

Isaiah 43:10 You are my witnesses, saith the Lord, and my servant whom I have chosen: that you may know, and believe me, and understand that I myself am. Before me there was no God formed, and after me there shall be none.

Matthew 4:10 Then Jesus saith to him: Begone, Satan: for it is written: The Lord thy God shalt thou adore, and him only shalt thou serve.

the Lord is God.