When the Messenger of Allah (ﷺ) said: Allah listened to him who praised Him, none of us bent his back till he (the Holy Prophet) prostrated; we then, afterwards, went down in prostration.
Sahih Muslim Book 4, Hadith 225
← Previous Hadith They used to say prayer behind the Messenger of Allah (ﷺ). I never saw anyone bending his back at the time when he (the Holy Prophet) raised his head, till the Messenger of Allah (ﷺ) placed his forehead on the ground. They then fell in prostration after him.

Sahih Muslim Book 4, Hadith 224 Next Hadith → They (the Companions) said prayer with the Messenger of Allah (ﷺ), and they bowed when he (the Holy Prophet) bowed. and when he raised his head after bowing, he pronounced:" Allah listened to him who praised Him," and we kept standing till we saw him placing his face on the ground and then we followed him.

Sahih Muslim Book 4, Hadith 226