Usayd bin Hudayr (r.a.) said that he was once reciting Surah Al-Baqarah while his horse was tied next to him. The horse started to make some noise. When Usaid stopped reciting, the horse stopped moving about. When he resumed reading, the horse started moving about again. (This happened thrice) Meanwhile, his son Yahya was close to the horse and he feared that the horse might step on him. When he moved his son back, he looked up at the sky and saw ‘A CLOUD RADIATING WITH LIGHT THAT LOOKED LIKE LAMPS.’
In the morning, he went to the Prophet (s.a.w.s.) and told him what had happened. The Prophet (s.a.w.s.) said: “Do you know what that was?” He said: ‘No!’ The Prophet (s.a.w.s.) said: “THEY WERE ANGELS, they came close hearing your voice (reciting Surah Al-Baqarah), and if you had kept on reading, the people would have been able to see the angels when the morning came, and the angels would not be hidden from their eyes.”
[Bukhari]