Musnad Ahmad 1153:20

Marhum ibn Abd al-Aziz narrated to us, he said: Abu Imran al-Jawni narrated to me, from Yazid ibn Babnus, from Aisha, that Abu Bakr entered upon the Prophet, may Allah bless him and grant him peace, after his death. He placed his mouth between his eyes, and placed his hands upon his temples, and said: "O my Prophet! O my intimate friend! O my chosen one!"