Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) says that the Prophet (peace and blessings be upon him) said: "The upper hand is better than the lower hand, and the upper hand is the one that refrains (from asking), and the lower hand is the one that asks."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7881