Mustadrak al-Hakim — Hadith 3103

It is narrated from Sayyidah Umm Kulthum bint Uqbah (may Allah be pleased with her), one of the early emigrant women, concerning the saying of Allah, the Mighty and Majestic, "Seek help through patience and prayer" [Surah al-Baqarah: 153], that she said: (Her husband) Sayyiduna Abd al-Rahman bin Awf (may Allah be pleased with him) fell unconscious, so much so that the people thought his soul had departed and he had breathed his last. His wife Umm Kulthum (may Allah be pleased with her) went out (in distress) to the mosque to seek help through the patience and prayer that Allah had commanded. When he came to, he asked: Did I just fall unconscious? They said: Yes. He said: You have spoken the truth. Two angels came to me and said: Come, we will take your case to the Mighty, the Trustworthy (Allah) for judgement. Then another angel said: Take him back, for he is among those for whom Allah wrote felicity while they were in their mothers' wombs, and his sons will benefit from him for as long as Allah wills. So he lived for a month after this incident and then passed away.
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.