Sunan an-Nasa'i, Hadith 2487 ⓘ
It was narrated from Abu Sa'eed Al_khudri that the Prophet said: "No sadaqah is due on less than five Awaq, no Sadaqah is due on less than five Dhawd, no Sadaqah is due on less than five Awsuq."
أَخْبَرَنَا أَحْمَدُ بْنُ عَبْدَةَ، قَالَ حَدَّثَنَا حَمَّادٌ، عَنْ يَحْيَى بْنِ سَعِيدٍ، وَعُبَيْدِ اللَّهِ بْنِ عُمَرَ، عَنْ عَمْرِو بْنِ يَحْيَى، عَنْ أَبِيهِ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لَيْسَ فِيمَا دُونَ خَمْسِ أَوَاقٍ صَدَقَةٌ وَلاَ فِيمَا دُونَ خَمْسِ ذَوْدٍ صَدَقَةٌ وَلَيْسَ فِيمَا دُونَ خَمْسَةِ أَوْسُقٍ صَدَقَةٌ " .
also referenced under: Book 23, Hadith 0 (In-Book) & Volume 3, Book 23, Hadith 2489 (DarusSalam)