Hadithcore
Al-Adab Al-Mufrad, 167
sahih· Al-Albani

Abu'l-'Aliyya said, "We were ordered to finish off things for the servant and to measure and count because we did not want to allow them to accustom themselves to bad habits nor for anyone to think evil of us."

حَدَّثَنَا بِشْرُ بْنُ مُحَمَّدٍ، قَالَ‏:‏ أَخْبَرَنَا عَبْدُ اللهِ، قَالَ‏:‏ أَخْبَرَنَا أَبُو خَلْدَةَ، عَنْ أَبِي الْعَالِيَةِ قَالَ‏:‏ كُنَّا نُؤْمَرُ أَنْ نَخْتِمَ عَلَى الْخَادِمِ، وَنَكِيلَ، وَنَعُدَّهَا، كَرَاهِيَةَ أَنْ يَتَعَوَّدُوا خُلُقَ سُوءٍ، أَوْ يَظُنَّ أَحَدُنَا ظَنَّ سُوءٍ‏.‏

References2 variants
In-Book Reference
Book 9, Hadith 12
English Reference
Book 9, Hadith 167