Muwatta Malik
Book 54, Hadith 42
Arabic hadith text
وَحَدَّثَنِي مَالِكٌ، أَنَّهُ بَلَغَهُ أَنَّ عُمَرَ بْنَ الْخَطَّابِ، كَانَ يَذْهَبُ إِلَى الْعَوَالِي كُلَّ يَوْمِ سَبْتٍ فَإِذَا وَجَدَ عَبْدًا فِي عَمَلٍ لاَ يُطِيقُهُ وَضَعَ عَنْهُ مِنْهُ .
Translation
Malik related to me that he heard that Umar ibn al-Khattab wentto the villages every Saturday. If he found a slave doing work whichhe was not capable of doing, he lightened it for him.