Arabic (Original)
حَدَّثَنَا الْفَضْلُ بْنُ دُكَيْنٍ حَدَّثَنَا سُفْيَانُ عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ سَمِعْتُ ابْنَ عُمَرَ يَقُولُ قَالَ رَجُلٌ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنِّي أُخْدَعُ فِي الْبَيْعِ فَقَالَ إِذَا بَايَعْتَ فَقُلْ لَا خِلَابَةَ فَكَانَ الرَّجُلُ يَقُولُهُ.
English Translation
al-Fadl b. Dukayn told us, Sufyan told us, from Abdullah b. Dinar: I heard Ibn Umar say: A man said to the Prophet, peace and blessings be upon him: "I am deceived in trading." He said: "When you conduct a transaction, say, 'No deception.'" So the man used to say it.