Sahih al-Bukhari 3782
In-book no 3782حَدَّثَنِي الْحَسَنُ بْنُ عُمَرَ بْنِ شَقِيقٍ، حَدَّثَنَا مُعْتَمِرٌ، قَالَ أَبِي وَحَدَّثَنَا أَبُو عُثْمَانَ، عَنْ سَلْمَانَ الْفَارِسِيِّ، أَنَّهُ تَدَاوَلَهُ بِضْعَةَ عَشَرَ مِنْ رَبٍّ إِلَى رَبٍّ.
Narrated Salman Al-Farisi: That he was sold (as a slave) by one master to another for more than ten times (i.e between 13 and 19).