عَنْ مُجَاهِدٍ وَعَطَاءٍ عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا أَنَّ مُعَاوِيَةَ (ابْنَ أَبِي سُفْيَانَ رَضِيَ اللَّهُ عَنْهُ) أَخْبَرَهُ أَنَّهُ رَأَى رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَصَّرَ مِنْ شَعْرِهِ بِمِشْقَصٍ فَقُلْنَا لِابْنِ عَبَّاسٍ: مَا بَلَغَنَا هَذَا إِلَّا عَنْ مُعَاوِيَةَ فَقَالَ: مَا كَانَ مُعَاوِيَةُ عَلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ مُتَّهَمًا
It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with him) that Sayyiduna Muawiyah (may Allah be pleased with him) informed him that he saw the Messenger of Allah (peace and blessings be upon him) cut his hair with a broad blade. Mujahid and Ata say: We said to Sayyiduna Ibn Abbas (may Allah be pleased with him): This report has only reached us from Sayyiduna Muawiyah (may Allah be pleased with him). He replied: Sayyiduna Muawiyah (may Allah be pleased with him) is not to be suspected regarding the Messenger of Allah (peace and blessings be upon him) (i.e., he is truthful in conveying this report).