Muwatta Malik· موطأ مالك
Muwatta Malik 96
Wudu is necessary if a man kisses his wife
মুয়াত্তা ইমাম মালিক ৯৬ · মুয়াত্তা মালিক•Purity
وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَبْدَ اللَّهِ بْنَ مَسْعُودٍ، كَانَ يَقُولُ مِنْ قُبْلَةِ الرَّجُلِ امْرَأَتَهُ الْوُضُوءُ .
Narrator: Yahya
Yahya related to me from Malik that he had heard that Abdullah ibn Masud used to say, "Wudu is necessary if a man kisses his wife- Salim al-HilaliMauquf Sahih