Arabic hadith text
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 ‏.‏
Translation

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."