It wasnarrated from Abu Sa'eed Al-Khudri that the Prophet (ﷺ)said:
"There is no prayer after the 'Asr until the sun has set, andthere is no prayer after the Fajr until the sun has risen." (FR)
English reference (FR): Vol. 1, Book 5, Hadith 1249 (FR)
Arabic reference (FR): Book 5, Hadith 1307 (FR)