“The Prophet ﷺ was asked about a man who kissed his wife when they were both fasting. He said: ‘They have broken their fast.’” (Using translation from Ibn Mājah 1686)
عَنْ مَيْمُونَةَ مَوْلَاةِ النَّبِيِّ ﷺ قَالَتْ سُئِلَ رَسُولُ اللهِ ﷺ عَنْ رَجُلٍ قَبَّلَ امْرَأَتَهُ وَهُوَ صَائِمٌ قَالَ قَدْ أَفْطَرَا