The Book of Zuhd and Softening of Hearts
وَحَدَّثَنَا إِسْحَاقُ بْنُ مُوسَى الأَنْصَارِيُّ، حَدَّثَنَا أَنَسُ بْنُ عِيَاضٍ، حَدَّثَنِي عُبَيْدُ اللَّهِ، بِهَذَا الإِسْنَادِ . مِثْلَهُ غَيْرَ أَنَّهُ قَالَ فَاسْتَقَوْا مِنْ بِئَارِهَا وَاعْتَجَنُوا بِهِ .This hadith has been narrated on the authority of 'Abdullah with the same chain of transmitters but with a slight variation of wording
From Sahih Muslim, whose reports the scholars accept as authentic.