قَالَ مَالِكٌ : السُّنَّةُ عِنْدَنَا أَنَّ الرَّجُلَ إِذَا طَلَّقَ امْرَأَتَهُ وَلَهُ عَلَيْهَا رَجْعَةٌ فَاعْتَدَّتْ بَعْضَ عِدَّتِهَا، ثُمَّ ارْتَجَعَهَا، ثُمَّ فَارَقَهَا قَبْلَ أَنْ، يَمَسَّهَا أَنَّهَا لَا تَبْنِي عَلَى مَا مَضَى مِنْ عِدَّتِهَا، وَأَنَّهَا تَسْتَأْنِفُ مِنْ يَوْمَ طَلَّقَهَا عِدَّةً مُسْتَقْبَلَةً، وَقَدْ ظَلَمَ زَوْجُهَا نَفْسَهُ وَأَخْطَأَ، إِنْ كَانَ ارْتَجَعَهَا وَلَا حَاجَةَ لَهُ بِهَا
Imam Malik, may Allah have mercy on him, said that if a man divorces his wife, and as her waiting period (iddah) is about to end he takes her back, then divorces her again without having intercourse, the woman must observe a new waiting period from the beginning. The previous days will not be counted, but the husband will be sinful if he intended to cause her harm.