Charles Ellicott Commentary 2 Samuel 5:13

"And David took him more concubines and wives out of Jerusalem, after he was come from Hebron; and there were yet sons and daughters born to David." — 2 Samuel 5:13 (ASV)

More concubines and wives. —In Deuteronomy 17:17, the law had been given for the future king, “Neither shall he multiply wives to himself.” David certainly came perilously near a violation of this law, although he did not, like his son Solomon, take wives and concubines in enormous number for the sake of having a great harem—an important element in Eastern ideas of regal magnificence.

Any possible ambiguity in the phrase “ out of Jerusalem” is removed by the expression in the parallel place (1 Chronicles 14:3), “ at Jerusalem.” Altogether, here and in Chronicles, the names of nineteen sons are mentioned; those of the daughters are not given, although one, Thamar, is mentioned in the story in 2 Samuel 13:1.