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."
Reference: Sunan Abi Dawud 2230
In-book : Book 13, Hadith 56
English translation : Book 12, Hadith 2222