Arabic (Original)
حَدَّثَنَا أَبُو سَلَمَةَ أَخْبَرَنَا سُلَيْمَانُ بْنُ بِلَالٍ عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ عَنِ ابْنِ عُمَرَ قَالَ ذُكِرَ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ رَجُلٌ يُخْدَعُ فِي الْبَيْعِ فَقَالَ لَهُ مَنْ بَايَعْتَ فَقُلْ لَا خِلَابَةَ فَكَانَ يَقُولُ إِذَا بَايَعَ لَا خِلَابَةَ وَكَانَ فِي لِسَانِهِ رُتَّةٌ.
English Translation
Abu Salamah told us, Sulayman ibn Bilal informed us, from Abd Allah ibn Dinar, from Ibn Umar, who said: A man who was cheated in trading was mentioned to the Prophet (peace and blessings be upon him), so he said to him: "Whenever you trade, say: 'No deception.'" So he would say, whenever he traded: "No deception" - and he had a stammer in his speech.