Sahih Muslim 1659
Sahih Muslim · Book 27: The Book of Oaths · Treatment of slaves, and the expiation of one who slaps his slave
This hadith has been narrated on the authority of Shu'ba with the same chain of transmitters, but made no mention of (these words) of his:
وَحَدَّثَنِيهِ بِشْرُ بْنُ خَالِدٍ ، أَخْبَرَنَا مُحَمَّدٌ، - يَعْنِي ابْنَ جَعْفَرٍ - عَنْ شُعْبَةَ ، بِهَذَا الإِسْنَادِ وَلَمْ يَذْكُرْ قَوْلَهُ أَعُوذُ بِاللَّهِ أَعُوذُ بِرَسُولِ اللَّهِ صلى الله عليه وسلم .
I seek refuge with Allah, I seek refuge with Allah's Messenger (ﷺ).