Sunan At-Tirmidhi

Narrated 'Abdullah bin 'Umar:""I heard 'Umar bin Al-Khattab saying: 'The Messenger of Allah (ﷺ) said: ""Four before Zuhr, after the zenith, are reckoned with their like from Salat As-Sahr (meaning the reward is like that of the two Sunan and obligatory Rak'ah of Fajr)."" The Messenger of Allah (ﷺ) said: ""There is nothing but that it glorifies Allah at that hour."" Then he recited the Ayah: Their shadows shift from right to left, prostrating to Allah while they are humble (16:)