وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، أَنَّهُ قَالَ سَمِعْتُ عَبْدَ اللَّهِ بْنَ عُمَرَ، قَرَأَ ‏{‏يَا أَيُّهَا النَّبِيُّ إِذَا طَلَّقْتُمُ النِّسَاءَ فَطَلِّقُوهُنَّ‏}‏ لِقُبُلِ عِدَّتِهِنَّ ‏.‏ قَالَ مَالِكٌ يَعْنِي بِذَلِكَ أَنْ يُطَلِّقَ فِي كُلِّ طُهْرٍ مَرَّةً ‏.‏

Yahya related to me from Malik that Abdullah ibn Dinar said, "Iheard Abdullah ibn Umar recite from the Qur'an, 'Prophet! When youdivorce women, divorce them at the beginning of their idda.'" Malik said, "He meant by that, to make one pronouncement of divorce atthe beginning of each period of purity." Translation Not Available

Book Ref: Muwatta Imam Malik Book 29 Hadith 1241
Web Ref:  Muwatta Imam Malik Book 29 Hadith 79