The Messenger of Allah ﷺ used to kiss us on the face while he was fasting.
حدثنا روح حدثنا عوف حدثنا أوفى بن دلهم العدوي عن معاذة
أن رسول الله ﷺ كان ينال شيئا من وجوهنا وهو صائم
Its isnad is sahih. Awfa bin Dalham is trustworthy, and his hadith is found in Tirmidhi. The hadith has already appeared at 25167.