Abu Dawood also narrated (5170) that Abu Hurayrah (may Allah be pleased with him) said: The Messenger of Allah (blessings and peace of Allah be upon him) said: “Whoever turns a man’s wife or slave against him is not one of us.” Classed as saheeh by al-Albaani in Saheeh Abi Dawood.
Shaykh ‘Abd al-‘Azeem Abaadi (may Allah have mercy on him) said: “Whoever turns… against” means whoever deceives and corrupts. “a woman against her husband” by mentioning the husband’s bad qualities in front of his wife, or the good qualities of another man in front of her.
End quote from ‘Awn al-Ma‘bood, 6/159
And he said: “Whoever turns a man’s wife against him” means ruining and corrupting her, or making the idea of divorce seem good to her, so that he could marry her or someone else can marry her, and so on.
‘Awn al-Ma‘bood, 14/52
Some scholars are of the view that if a man turns a woman against her husband, it is permanently haraam for him to marry her, and his marriage to her is not valid.