Muwatta Malik, Book 58, Hadith 8 (USC-MSA)

Yahya related to me from Malik from Nafi from Abdullah ibn Umar that the Messenger of Allah, may Allah bless him and grant him peace, said from the mimbar when mentioning sadaqa and refraining from asking, "The upper hand is better than the lower hand. The upper hand is the one which expends, and the lower one is the one which asks."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ - وَهُوَ عَلَى الْمِنْبَرِ وَهُوَ يَذْكُرُ الصَّدَقَةَ وَالتَّعَفُّفَ عَنِ الْمَسْأَلَةِ - ‏ "‏ الْيَدُ الْعُلْيَا خَيْرٌ مِنَ الْيَدِ السُّفْلَى وَالْيَدُ الْعُلْيَا هِيَ الْمُنْفِقَةُ وَالسُّفْلَى هِيَ السَّائِلَةُ ‏" ‏ ‏.‏

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also referenced under: Book 58, Hadith 1851 (In-Book)