It is narrated from Sayyiduna Umar (may Allah be pleased with him) that if a man revokes the divorce after pronouncing it but does not inform his wife, then if the second husband has not consummated the marriage, the first husband has more right to her. However, if consummation has taken place, then the first husband no longer has any right.
Hadith Referenceسنن سعید بن منصور / كتاب الطلاق / 2493
Hadith Gradingمحدثین:مرسل
Hadith Takhrij«مرسل، وأخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 1314، 1315، 1316، وعبد الرزاق فى «مصنفه» برقم: 10977، 10978، وابن أبى شيبة فى «مصنفه» برقم: 19235، 19240، 19243»