4821
Sahih+3
Narrated AbuHurayrah: AbulQasim (ﷺ) said: When one of you is in the sun (Shams)--Makhlad's version has "fay'"--and the shadow withdraws from him so that he is partly in sun and partly in shade, he should get up
SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid