ENOfficial
Abu Sa'id al-Khudri reported God’s Messenger as saying, “If anyone pays in advance for an article he may not transfer, it to someone else before he receives it.” Abu Dawud and Ibn Majah transmitted it.
Source: sunnah.com
Other translations
Arabic
عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ أَسْلَفَ فِي شَيْءٍ فَلَا يَصْرِفْهُ إِلَى غَيْرِهِ قَبْلَ أَنْ يَقْبِضَهُ» . رَوَاهُ أَبُو دَاوُدَ وَابْنُ مَاجَهْ
sunnah.com