al-Aswad bin Yazid الأسود بن يزيد بن قيس النخعي · Chapters On Dreams

"I saw that the people had gathered, so Abu Bakr drew a bucket or two buckets- in him was some weakness- and Allah forgive him. Then 'Umar stood to draw and the bucket turned into a very large one, and I have never seen a strong man toiling so hard until it was as if the people had gathered at a (camel) watering hole."