Classical Sunni sources preserve a report that Abu Umamah al-Bahili may Allah be pleased with him had only three dinars and gave all three away, one to each of three petitioners. A household narrator says that nothing then remained for the family's food. Later that day, three hundred dinars were found beneath Abu Umamah's cushion or bedding, and he is reported to have been surprised by what had appeared. Abu Nu'aym preserves the clearest checked household route, al-Lalaka'i includes the episode among Abu Umamah's karamat, and al-Dhahabi calls it a striking karamah, but the immediate eyewitness is an unnamed female servant.
The household narrator then describes the practical consequence of that charity. After Abu Umamah had given away the three dinars, nothing remained for the household's food. The report therefore presents the event first as a real sacrifice: he did not distribute surplus wealth but gave away what he had.
Later that same day, the narration records an extraordinary change in the family's circumstances. Three hundred dinars were found beneath Abu Umamah's cushion or bedding. When the gold was shown to him, he is reported to have been startled and to have said that he did not know what it was. In the structure of the report, the sequence is direct: three dinars are given away to three petitioners, the household is left without food money, and a much larger sum is then unexpectedly found.
Abu Nu'aym preserves the clearest checked route through al-Walid ibn Muslim from Abd al-Rahman ibn Yazid ibn Jabir from a female servant of Abu Umamah. Al-Lalaka'i also preserves the story and includes it in his section on the karamat of Abu Umamah. Al-Dhahabi later describes the episode as a striking karamah, showing a clear positive classical reception.
The principal source limitation is also clear. The immediate household eyewitness in the route is an unnamed female servant, and Task 1 did not locate an explicit sahih grading for the exact chain. The later classical reception therefore supports the story's presence and importance without converting it into a sahih Prophetic hadith.
The safest conclusion is that classical Sunni sources preserve a report of Abu Umamah giving away his last three dinars and later finding three hundred dinars in his household. The event is best presented as a medium-confidence Companion karamah of extraordinary provision, with the unnamed eyewitness and chain limits stated openly.
Conclusion
Classical Sunni sources preserve a report that Abu Umamah gave away his final three dinars and that three hundred dinars were later found beneath his cushion or bedding. The story has positive classical karamah reception, but the unnamed eyewitness keeps it at medium confidence and supports inclusion with caution.