31 The children of Gad and the children of Reuben answered, saying, "As Yahweh has said to your servants, so will we do.
*Minor differences ignored. Grouped by changes, with first version listed as example.
And the children of Gad and the children of Reuben answered, saying, As the (l) LORD hath said unto thy servants, so will we do.
(l) This is attributed to the Lord, which his messenger speaks.
And the children of Gad and the children of Reuben answered,...., The word is in the singular number, and shows their unanimity, that they agreed to what Moses said, and replied all of them as one man, as Jarchi expresses it; and it may be there was one that was the mouth of them all, and answered for them:
saying, as the Lord hath said unto thy servants, so will we do; here they make use of the word Jehovah, taking what Moses had said unto them as from the Lord, and therefore should strictly and punctually observe it, as if they heard the Lord himself speak it.
The Gadites and Reubenites repeated their promise once more (Numbers 32:25), and added still further (Numbers 32:32): "We will pass over armed before Jehovah into the land of Canaan, and let our inheritance be with us (i.e., remain to us) beyond the Jordan."
As the Lord hath said - Either at this time by thy mouth: or formerly, where he commanded us, as well as our brethren to go into Canaan and possess it.
*More commentary available at chapter level.