The servant gets a reward for giving charity when ordered by the owner
حَدَّثَنَا مُحَمَّدُ بْنُ الْعَلاَءِ، حَدَّثَنَا أَبُو أُسَامَةَ، عَنْ بُرَيْدِ بْنِ عَبْدِ اللَّهِ، عَنْ أَبِي بُرْدَةَ، عَنْ أَبِي مُوسَى، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " الْخَازِنُ الْمُسْلِمُ الأَمِينُ الَّذِي يُنْفِذُ ـ وَرُبَّمَا قَالَ يُعْطِي ـ مَا أُمِرَ بِهِ كَامِلاً مُوَفَّرًا طَيِّبٌ بِهِ نَفْسُهُ، فَيَدْفَعُهُ إِلَى الَّذِي أُمِرَ لَهُ بِهِ، أَحَدُ الْمُتَصَدِّقَيْنِ ".
Narrated Abu Musa: The Prophet (ﷺ) said, "An honest Muslim storekeeper who carries out the orders of his master and pays fully what he has been ordered to give with a good heart and pays to that person to whom he was ordered to pay, is regarded as one of the two charitable persons."