Muwatta Imam Malik Book of Divorce, Hadith 4

Yahya related to me from Malik from Ibn Shihab that Marwan ibn al-Hakam decided that if someone made three pronouncements of divorce, he had divorced his wife irrevocably.
Malik said, "That is what I like best of what I have heard on the subject."
29.2 Divorce by Euphemistic Statements

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، أَنَّ مَرْوَانَ بْنَ الْحَكَمِ، كَانَ يَقْضِي فِي الَّذِي يُطَلِّقُ امْرَأَتَهُ الْبَتَّةَ أَنَّهَا ثَلاَثُ تَطْلِيقَاتٍ . قَالَ مَالِكٌ وَهَذَا أَحَبُّ مَا سَمِعْتُ إِلَىَّ فِي ذَلِكَ .