"Now Satan stood up against Israel and moved David to number Israel." -- 1 Chronicles 22:2, The Holy Bible "And David said to God, 'Was it not I who commanded the people to be numbered? I am the one who has sinned and done evil indeed...'" 1 Chronicles 21:17, The Holy Bible Although Chronicles I doesn't say why the numbering was evil, it's been suggested that perhaps David was trusting more in military might than in God, or perhaps it was wrong how the people were numbered, because, possibly, it was a violation of how Moses had been instructed to conduct a census, as described in the book of Exodus 30:11-16. This census recorded in I Chronicles is also described in 2 Samual 24, but there it states that God allowed the numbering because He was angry with Israel, so God moved David to take the census. Since it says in the Bible that God doesn't tempt people to sin, 2 Samual 24 is construed to mean that God allowed David to do what he wanted to do already, that Satan was allowed to temp David because sin had already been concieved in David's heart, but in any case, both scriptures are clearly consistent in that they both suggest that the numbering was a move "against Israel," not something good to be desired, but something sinful to be feared. In any case, it's very interesting that in the few OT scriptures that mention Satan, Satan is seen to favor the numbering of the people.