Sunan Abī Dāwūd 2230✓ 5Sahih
حَدَّثَنَا الْقَعْنَبِيُّ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ عِدَّةُ الْمُخْتَلِعَةِ حَيْضَةٌ .
Ibn 'Umar said "The waiting period of a woman who separates herself from her husband for compensation is a menstrual period."