John Wesley on 2 Samuel 5:13

David took, &c. - This may well be reckoned amongst David's miscarriages, the multiplication of wives being expresly forbidden to the king, Deut 17:17. It seems to have been his policy, that hereby he might enlarge his family, and strengthen his interest by alliances with so many considerable families. But all these did not preserve him from coveting his neighbour's wife. Rather they inclined him to it: for men who have once broke the fence, will wander carelesly.