Musnad Abu Ya'la al-Mawsili 150:106

Al-Hasan ibn Hammad narrated to us, Ibrahim ibn 'Uyaynah narrated to us, from Salih ibn Hassan, from Hisham ibn 'Urwah, from his father, from 'Aishah, who said: I sat weeping at the head of the Prophet, may Allah bless him and grant him peace. He said to me: "What makes you weep? If you wish to join me, then let the provision of a rider suffice you from the world, and do not associate with the wealthy."