"The Prophet (ﷺ) forbade praying after the Fajr prayer till the sun rises and after the `Asr prayer till the sun sets."

Narrated Ibn `Abbas:

Some people told me the same narration (as above).
Sahih al-Bukhari Book 9, Hadith 57
← Previous Hadith Allah's Messenger (ﷺ) said, "Whoever could get one rak`a of a prayer, (in its proper time) he has got the prayer."

Sahih al-Bukhari Book 9, Hadith 56 Next Hadith → Ibn `Umar said, "Allah's Messenger (ﷺ) said, 'Do not pray at the time of sunrise and at the time of sunset.' " Ibn `Umar said, "Allah's Messenger (ﷺ) said, 'If the edge of the sun appears (above the horizon) delay the prayer till it becomes high, and if the edge of the sun disappears, delay the prayer till it sets (disappears completely).' "

Sahih al-Bukhari Book 9, Hadith 58