Hadith 13:56
Sahih Mauquf (Al-Albani)
Ibn ‘Umar said “The waiting period of a woman who separates herself from her husband for compensation is a menstrual period.”
حَدَّثَنَا الْقَعْنَبِيُّ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ عِدَّةُ الْمُخْتَلِعَةِ حَيْضَةٌ
Original Reference: Sunan Abi Dawud 2230