Ilyas ibn Dighfal said: I saw AbuNadrah kissing on the cheek of al-Hasan.  

رَأَيْتُ أَبَا نَضْرَةَ قَبَّلَ خَدَّ الْحَسَنِ بْنِ عَلِيٍّ عَلَيْهِمَا السَّلاَمُ  

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.  

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