One day a poor man came to the Holy Prophet (S) and told him of his poverty. The Prophet (S) said,
“Sit down! Allah is most Powerful.”
Another beggar came and the Holy Prophet (S) told him to sit down too. Then a third destitute arrived and the Prophet (S) told him also to sit down. After some time a person came and presented four sā (approximately 12 kilos) of wheat as Zakat to the Holy Prophet (S). The Holy Prophet (S) distributed one sā (3 kilos) of wheat to each of the poor men. One sā of it remained. After the Maghrib and Isha prayers the Holy Prophet (S) announced that a sā of wheat is remaining with him. Any needy person can come and collect it from him; but no one came forward. The Holy Prophet (S) was compelled to take this trust home. Ayesha says that, that night the Holy Prophet (S) was very restless. When she inquired the reason of his restlessness he replied,
“I am fearful of the consequences in case I die today and this trust is not delivered to a deserving person.”
It is also mentioned that when the Holy Prophet (S) was on his deathbed, he had an amount of six or seven dinars for the poor and the needy, remaining with him. He sent for the money and after counting it, said,
“It is possible that Muhammad (S) may reach the presence of his Lord while these dinars are still in his custody!”
Then he (S) summoned Amir ul-Mu’minīn Hazrat ‘Ali (a.s.), and gave him the dinars for the poor and the destitutes and then said,
“Now I can rest in peace.”( Nāseekhut Tawarikh Vol.3, Pg544 )