Amr bin 'Uthman عمرو بن عثمان بن عفان · The Book of the Commencement of the Prayer

The Messenger of Allah (ﷺ) used to pause briefly when he had started to pray.

He heard Abu Ad-Darda say: "The Messenger of Allah (ﷺ) was asked: 'Is there recitation in every prayer?' He said: 'Yes.' A man among the Ansar said: 'Is that obligatory?' He (Abu Ad-Darda) turned to me (Kathir), as I was closest of the people to him, and said: 'I think that if the Imam leads the people, that is sufficient for them.'"

"We used to pray Zuhr behind the Prophet (ﷺ) and we heard some of the verses from Surah Luqman and Adh-Dhariyat from him."

He said to Marwan: "O Abu Abdul-Malik, do you recite: 'Say: He is Allah, (the) One' and 'Verily, We have granted you Al-Kawthar' in maghrib?" He said: "Yes." He (Zaid) said: "I swear by Allah, I saw the Messenger of Allah (ﷺ) reciting the longer of the two long surahs in it: 'Alif-Lam-Mim-Sad.'"