It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) concerning a man who marries a woman with the aim of making her lawful (for her former husband) that he said: "They are both fornicators, even if they remain together for ten years or twenty years, since he married her only for that purpose."
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الوليمة / 1693
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :إسناده صحيح لغيره. » «انفرد به المصنف من هذا الطريق»