John Gill Commentary Numbers 5:1

"And Jehovah spake unto Moses, saying," — Numbers 5:1 (ASV)

And the Lord spoke to Moses
Jarchi says, what follows was said on the day the tabernacle was erected, but it seems rather to have been delivered after the several camps were formed, and the people numbered, when those that were unclean were ordered to be cast out of them:

saying ;
as follows.