Musannaf Ibn Abi Shayba 3:3740

Waki’ narrated to us, he said: Abd al-Rahman ibn Sulayman ibn al-Ghasil narrated to us, he said: al-Mundhir ibn Abi Usayd al-Ansari narrated to me, he said: My father used to pray behind me, and perhaps he would say to me: "O my son, you have made it long for us today."