Abu Bakr kissed the Prophet ﷺ between his eyes after he had died.
أخبرنا أحمد بن عمرو قال أنبأنا ابن وهب قال أخبرني يونس عن ابن شهاب عن عروة
أن أبا بكر قبل بين عيني النبي ﷺ وهو ميت
No references are available.
[Sahih]. It is found in Sunan al-Kubra, hadith no. 1965, and the following hadith serves as a corroborating witness for it.