Musnad Ahmad 1186:2

'Abd al-Samad narrated to us, he said: 'Abd Allah ibn Yazid ibn Dhabba al-Ta'ifi narrated to us, he said: My paternal aunt, who was called Sarah bint Miqsam, narrated to me, from her mistress Maymunah bint Kurdam, that she was with her father. She mentioned that she saw the Messenger of Allah, may Allah bless him and grant him peace, upon a she-camel, and in his hand was a whip (durrah). Then she mentioned the hadith.