عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ يَقُولُ كُنَّا مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فِي الْمَسْجِدِ فَلَمَّا قَامَ قُمْنَا مَعَهُ فَجَاءَهُ أَعْرَابِيٌّ فَقَالَ أَعْطِنِي يَا مُحَمَّدُ قَالَ فَقَالَ لَا وَأَسْتَغْفِرُ اللَّهَ فَجَذَبَهُ فَخَدَشَهُ قَالَ فَهَمُّوا بِهِ قَالَ دَعُوهُ قَالَ ثُمَّ أَعْطَاهُ قَالَ وَكَانَتْ يَمِينُهُ أَنْ يَقُولَ لَا وَأَسْتَغْفِرُ اللَّهَ
It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him), he says: We were in the mosque with the Messenger of Allah (peace and blessings be upon him), when he (peace and blessings be upon him) stood up, we also stood up. Meanwhile, a Bedouin came and said: O Muhammad! Give me something. The Prophet (peace and blessings be upon him) said: No, and I seek forgiveness from Allah. He pulled the Prophet (peace and blessings be upon him), which caused a scratch to the Prophet (peace and blessings be upon him). The companions wanted to do something to him, but the Prophet (peace and blessings be upon him) said: Leave him. Then the Prophet (peace and blessings be upon him) gave him something. The Prophet (peace and blessings be upon him) would also swear in these words: Lā wa astaghfirullāh (No, and I seek forgiveness from Allah).