حَدَّثَنِي عَلِيُّ بْنُ حُجْرٍ، حَدَّثَنَا سُفْيَانُ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، - رضى الله عنها - قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُقَبِّلُ إِحْدَى نِسَائِهِ وَهُوَ صَائِمٌ ‏.‏ ثُمَّ تَضْحَكُ ‏.‏
Translation
Umar b Abu Salama reported that he asked the Messenger of Allah (ﷺ)

Should one observing fast kiss (his wife)? The Messenger of Allah (ﷺ) said to him: Ask her (Umm Salama). She informed him that the Messenger of Allah (ﷺ) did that, where upon he said: Messenger of Allah, Allah pardoned thee all thy sins, the previous and the later ones. Upon this the Messenger of Allah (ﷺ) ) said: By Allah, I am the most God conscious among you and I fear Him most among you.