Hadith #5222 (Sunan Abi Dawud)
Book: General Behavior (Kitab Al-Adab)
Narrator(s): Abdur Rahman bin Abi Layla عبد الرحمن بن أبي ليلى, Amr bin 'Awn/'Auf bin Aws, Husayn bin 'Abdur Rahman al-Salmi حصين بن عبد الرحمن السلمي, Khalid bin 'Abdullah al-Tahan خالد بن عبد الله بن عبد الرحمن الطحان, Usaid bin Hudair bin Sammak
Grade: Sahih

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.

Source: https://parallelquran.com/hadith/sunan-abi-dawud-5222/