I went in with AbuBakr when he had newly come to Medina and he found his daughter Aisha lying down afflicted with fever. AbuBakr went to her, and saying: How are you, girlie? kissed her on the cheek. (Using translation from Abū Dāʾūd 5222)   

دَخَلْتُ مَعَ أَبِي بَكْرٍ ؓ أَوَّلَ مَا قَدِمَ الْمَدِينَةَ فَإِذَا عَائِشَةُ ابْنَتُهُ مُضْطَجِعَةٌ قَدْ أَصَابَهَا حُمَّى فَأَتَاهَا أَبُو بَكْرٍ ؓ فَقَالَ كَيْفَ أَنْتِ يَا بُنَيَّةُ وَقَبَّلَ خَدَّهَا  

[Machine] I saw Abu Nadrah kissing the cheek of Al-Hasan, meaning Al-Basri, may Allah the Most High have mercy on him.  

رَأَيْتُ أَبَا نَضْرَةَ قَبَّلَ خَدَّ الْحَسَنِ يَعْنِي الْبَصْرِيَّ رَحِمَهُ اللهُ تَعَالَى