وَعَن عَائِشَةَ قَالَتْ: إِنَّ أَبَا بَكْرٍ قَبَّلَ
النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَهُوَ مَيِّتٌ
She said that Abu Bakr kissed the Prophet (sallallahu alayhi wa sallam) when he was dead.
Mishkat al-Masabih 1543, Book 6, Funerals, Hadith 100. 1 min read