What does 2 Samuel 3:14 mean?

David also sent messengers to Ish-bosheth, Saul's son, demanding, 'Give me back my wife Michal, who I paid for with a hundred Philistine foreskins.' 2 Samuel 3:14 - Modern Text Bible

(David formally demands Michal's return, reminding Ish-bosheth of the bride price he paid, asserting his rights.)