Musnad Ahmad 27:1128

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from 'Umar ibn Muhammad ibn Zayd, that he heard his father, Muhammad, narrating from 'Abdullah, that the Messenger of Allah, may Allah bless him and grant him peace, said: "Jibril, may Allah bless him and grant him peace, continued to advise me regarding the neighbor, until I thought that he would make him an heir — or he said: I feared that he would make him an heir."