Musnad Ahmad 27:77

Abu Mu'ammar Sa'id ibn Khuthaym narrated to us, Hanzalah narrated to us, from Salim ibn 'Abdullah, who said: My father, 'Abdullah ibn 'Umar, used to say to a man when he came to him intending to travel: "Come close so that I may bid you farewell as the Messenger of Allah, may Allah bless him and grant him peace, used to bid us farewell." Then he would say: "I entrust to Allah your religion, your trust, and the final outcomes of your deeds."