Yazid bin Zari' يزيد بن زريع · The Book on Salat (Prayer)

"Bilal was ordered to make the phrases of the Adhan even, and the phrases of the Iqamah odd."

the Prophet said: "Let those among you with understanding and reason be close to me, then those after them, then those after them. And do not separate or dissention will occur among your hearts, and beware of the commotion of the markets."

Allah's Messenger said: "When the Iqamah is called for Salat do not come to it rushing, rather come to it walking, and while you have tranquility. What you catch of it then pray it, and what you missed of it, then complete it."

"I was a companion rider on a female donkey with Al-Fadl. We came while the Prophet and his Companions were performing Salat at Mina." He said: "We dismounted from it and joined the row. The donkey then passed in front of them, and this did not invalidate their Salat."