Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) took four hundred dinars and put them in a pouch, then said to his servant: "Take this to Abu Ubaydah bin al-Jarrah (may Allah be pleased with him), then stay a while in the house so that you see what he does." So the servant took it to him and said: "The Commander of the Believers says to you: Use this for some of your needs." He said: "May Allah reward him and have mercy on him." Then he said: "Come, O slave girl! Take these seven dinars to so-and-so, and these five to so-and-so," until he had given them all away. The servant returned and told him, and he found that he (Umar) had prepared the same amount for Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him). He said: "Take this to Mu'adh bin Jabal and stay in the house so that you see what he does." So he took it to him and said: "The Commander of the Believers says to you: Use this for some of your needs." He said: "May Allah have mercy on him and reward him. Come, O slave girl! Take so much to the house of so-and-so, and take so much to the house of so-and-so." Meanwhile the wife of Sayyiduna Mu'adh (may Allah be pleased with him) looked in and said: "By Allah, we too are poor, so give to us as well." Only two dinars remained in the pouch, so he gave those to her. The servant returned to Sayyiduna Umar (may Allah be pleased with him) and told him, and he was pleased by that and said: "These people are like true brothers to one another."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17182