The Book of Transactions
وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا سُلَيْمَانُ بْنُ بِلاَلٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، أَخْبَرَنِي نَافِعٌ، أَنَّهُ سَمِعَ عَبْدَ اللَّهِ بْنَ عُمَرَ، يُحَدِّثُ أَنَّ زَيْدَ بْنَ ثَابِتٍ، حَدَّثَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم رَخَّصَ فِي الْعَرِيَّةِ يَأْخُذُهَا أَهْلُ الْبَيْتِ بِخَرْصِهَا تَمْرًا يَأْكُلُونَهَا رُطَبًا .Zaid b. Thabit reported that Allah's Messenger (ﷺ) give concession in case of 'ariyya transactions according to which the members of the household give dry dates according to a measure and then eat fresh dates (in exchange for it)
From Sahih Muslim, whose reports the scholars accept as authentic.