Sunan an-Nasa'i, Volume 3, Book 23, Hadith 2463 (DarusSalam) ⓘ
It was narrated that Ash-Shabbi said: "Jarir said: 'The Messenger of Allah said: When the Zakah collector comes to you, let him leave happy with you."'
أَخْبَرَنَا زِيَادُ بْنُ أَيُّوبَ، قَالَ حَدَّثَنَا إِسْمَاعِيلُ، - هُوَ ابْنُ عُلَيَّةَ - قَالَ أَنْبَأَنَا دَاوُدُ، عَنِ الشَّعْبِيِّ، قَالَ قَالَ جَرِيرٌ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِذَا أَتَاكُمُ الْمُصَدِّقُ فَلْيَصْدُرْ وَهُوَ عَنْكُمْ رَاضٍ " .
also referenced under: Hadith 2461 (Reference) & Book 23, Hadith 0 (In-Book)