Sunan an Nasai 1839
The Book of Funerals
أَخْبَرَنَا أَحْمَدُ بْنُ عَمْرٍو، قَالَ أَنْبَأَنَا ابْنُ وَهْبٍ، قَالَ أَخْبَرَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، أَنَّ أَبَا بَكْرٍ، قَبَّلَ بَيْنَ عَيْنَىِ النَّبِيِّ صلى الله عليه وسلم وَهُوَ مَيِّتٌ .
It was narrated from 'Aishah:that Abu Bakr kissed the Prophet between the eyes when he had died
Grading: Abu Ghuddah: Sahih · Al-Albani: Sahih · Zubair Ali Zai: Daif
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.