It was narrated that Abu Hurairah said: "A man from among the Ansar, came and said: 'O Messenger of Allah, why do I see that your color has changed?' Be said: 'Hunger.' So the Ansari went to his dwelling, but he did not find anything in his dwelling, so he went out looking, and he found a Jew watering his date palm trees. The Ansari said to the Jew: 'Shall I water your trees?' He said: 'Yes.' He said: 'Every bucket for one date.' And the Ansari stipulated that he would not take any dates that were black (rotten), hard and dried au t or inferior and he would only take good quality dates. He earned nearly two Sa's (of dates), and he brought It to the Prophet."