Allah's Messenger (ﷺ) made a small room in the month of Ramadan (Sa`id said, "I think that Zaid bin Thabit said that it was made of a mat") and he prayed there for a few nights, and so some of his companions prayed behind him. When he came to know about it, he kept on sitting. In the morning, he went out to them and said, "I have seen and understood what you did. You should pray in your houses, for the best prayer of a person is that which he prays in his house except the compulsory prayers."
Sahih al-Bukhari Book 10, Hadith 125
← Previous Hadith The Prophet (ﷺ) had a mat which he used to spread during the day and use as a curtain at night. So a number of people gathered at night facing it and prayed behind him.

Sahih al-Bukhari Book 10, Hadith 124 Next Hadith → Allah's Messenger (ﷺ) rode a horse and fell down and the right side of his body was injured. On that day he prayed one of the prayers sitting and we also prayed behind him sitting. When the Prophet (ﷺ) finished the prayer with Taslim, he said, "The Imam is to be followed and if he prays standing then pray standing, and bow when he bows, and raise your heads when he raises his head; prostrate when he prostrates; and if he says "Sami`a l-lahu liman hamidah", you should say, "Rabbana wa laka l-hamd.:

Sahih al-Bukhari Book 10, Hadith 126