In the lifetime of the Prophet (ﷺ) we used to speak while praying, and one of us would tell his needs to his companions, till the verse, 'Guard strictly your prayers (2.238) was revealed. After that we were ordered to remain silent while praying.
Sahih al-Bukhari Book 21, Hadith 4
← Previous Hadith The same as No. 290. from the Prophet.

Sahih al-Bukhari Book 21, Hadith 3 Next Hadith → The Prophet (ﷺ) went out to affect a reconciliation between the tribes of Bani `Amr bin `Auf and the time of the prayer became due; Bilal went to Abu Bakr and said, "The Prophet (ﷺ) is detained. Will you lead the people in the prayer?" Abu Bakr replied, "Yes, if you wish." So Bilal pronounced the Iqama and Abu Bakr led the prayer. In the meantime the Prophet (ﷺ) came crossing the rows (of the praying people) till he stood in the first row and the people started clapping. Abu Bakr never looked hither and thither during the prayer but when the people clapped too much, he looked back and saw the Prophet (ﷺ) in the (first) row. The Prophet (ﷺ) waved him to remain at his place, but Abu Bakr raised both his hands and sent praises to Allah and then retreated and the Prophet (ﷺ) went forward and led the prayer. (See Hadith No. 295 & 296)

Sahih al-Bukhari Book 21, Hadith 5