Amr bin Hisham عمرو بن هشام · The Book of Salah

"While I was at the Ka'bah, in a state between sleep and wakefulness, three men came, and one of them who was in the middle came toward me. I was brought a basin of gold, filled with wisdom and faith, and he slit open from the throat to the lower abdomen, and washed the heart with Zamzam water, then - "it was filled with wisdom and faith. Then I was brought a riding-beast, smaller than a mule and bigger than…