Mishkat al-Masabih
Ibn Mas'ud used to say, “Ablution is necessary when a man kisses his wife.” Malik transmitted it.
وَعَن ابْن مَسْعُود كَانَ يَقُولُ: مِنْ قُبْلَةِ الرَّجُلِ امْرَأَتَهُ الْوُضُوءُ. رَوَاهُ مَالك
Reference
Ibn Mas'ud used to say, “Ablution is necessary when a man kisses his wife.” Malik transmitted it.
وَعَن ابْن مَسْعُود كَانَ يَقُولُ: مِنْ قُبْلَةِ الرَّجُلِ امْرَأَتَهُ الْوُضُوءُ. رَوَاهُ مَالك
Reference