The Book of Transactions
وَحَدَّثَنَاهُ ابْنُ الْمُثَنَّى، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ عُبَيْدِ اللَّهِ، بِهَذَا الإِسْنَادِ وَقَالَ أَنْ تُؤْخَذَ بِخَرْصِهَا .Ubaidullah reported this hadith with a slight change of words on the same authority (as quoted above)
From Sahih Muslim, whose reports the scholars accept as authentic.