Charles Ellicott Commentary Numbers 13:3

"And Moses sent them from the wilderness of Paran according to the commandment of Jehovah: all of them men who were heads of the children of Israel." — Numbers 13:3 (ASV)

And Moses, by the commandment of the Lord, sent them, etc.— Better, And Moses sent them, from the wilderness of Paran, according to the command (literally, the mouth) of the Lord, that is, as appears from Deuteronomy 1:19, from Kadesh-barnea.