Abu Dawud Book 2, Hadith Number 1308.
Chapter : On a person who misses his daily round of recital.
Narated By ‘Umar b. al-Khattab : The Apostle of Allah (PBUH) said: He who misses his daily round of recital or a part of it due to sleep and he recites it between the dawn and the noon prayers, will be reckoned as if he recited it at night.