A Person Praying Voluntary Prayers In The Same Place That He Prayed The Obligatory Prayer Sunan Abi Dawud 1006
Translation
Narrated AbuHurayrah
The Messenger of Allah (ﷺ) said: "Is any one of you incapable..." - [Abd al-Warith said in his version:] "...of stepping forward, or stepping backward, or to his right, or to his left?" - and Hammad added in his version: "...during prayer," meaning in the supererogatory prayer.