John Gill Commentary 1 Samuel 30:5

"And David`s two wives were taken captive, Ahinoam the Jezreelitess, and Abigail the wife of Nabal the Carmelite." — 1 Samuel 30:5 (ASV)

And David's two wives were taken captives
Which is observed as one cause of his particular distress, and another follows in (1 Samuel 30:6) :

Ahinoam the Jezreelitess, and Abigail the wife of Nabal the Carmelite :
that is, who had been his wife; for he was now dead, (1 Samuel 25:39) , and was so before she was married to David; both these came with him to Gath, and were left at Ziklag when he went with Achish, and here they were taken; see (1 Samuel 25:42 1 Samuel 25:43) (27:3) .