Awn bin Abi Juhayfa عون بن أبي جحيفة · The Book on Salat (Prayer)

"I saw Bilal calling the Adhan, and turning, and his (face) was following here and there, and his (index) fingers were in his ears, and Allah's Messenger was in a small red tent" - "I think," he (one of the narrators) said, "it was made from a hide" - so Bilal went out in front of him with an Anazah which he planted (in the ground) at Batha. Allah's Messenger prayed facing it, and a dog and a donkey passed…