Qais quoted his father as saying that he (his father) came when the Messenger of Allah (ﷺ) was addressing. He stood in the sun. He ordered him (to shift) and he shifted to the shade.
Sunan Abi Dawud Book 43, Hadith 50
← Previous Hadith 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.

Sunan Abi Dawud Book 43, Hadith 49 Next Hadith → the Messenger of Allah (ﷺ) entered the mosque, and saw them (his companions) in separate groups. He said: How is it that I see you in separate groups?

Sunan Abi Dawud Book 43, Hadith 51