Hazrat Abu Hurairah RA narrates that a man in the times of Prophet Muhammad PBUH reached his home. He saw them in the condition of poverty. He left towards the woods to pray to Allah. When his chaste wife saw that her husband has left to pray to Allah, then she relied on Allah’s blessing and started preparations. She came near the grindstone and prepared it. (So that when grain shall come by the will of Allah, then it could be grinded soon). Then she approached the oven & heated it.

Then she prayed herself that O Allah! Bless us with sustenance. After that she saw that the place reserved for flour in the grindstone is full of flour. Then she went to the oven and saw it to be full of bread. (Maximum bread was being cooked)

Then her husband returned & inquired that did you receive anything after my departure?  The wife said yes! We have received something from our Creator (Meaning received directly from the divine treasure). On listening this, he went to the grindstone. (And picked it up in amazement and lifted its paat [apparatus of grinding]). When the Prophet Muhammad PBUH was told about this incident then the Prophet PBUH replied that you should know that if you wouldn’t have picked it up then the grindstone would have kept running till Qayamat and flour would have kept coming. [Masand Ahmad; Maarif-ul-Hadees; Vol 2; p318]