the Prophet ﷺ prayed in a Khamisa (a square garment) having marks. During the prayer, he looked at its marks. So when he finished the prayer he said, "Take this Khamisa of mine to Abu Jahm and get me his Inbijaniya (a woolen garment without marks) as it (the Khamisa) has diverted my attention from the prayer." Narrated ʿAisha: The Prophet ﷺ said, 'I was looking at its (Khamisa's) marks during the prayers and I was afraid that it may put me in trial (by taking away my attention).  

أَنَّ النَّبِيَّ ﷺ صَلَّى فِي خَمِيصَةٍ لَهَا أَعْلاَمٌ فَنَظَرَ إِلَى أَعْلاَمِهَا نَظْرَةً فَلَمَّا انْصَرَفَ قَالَ اذْهَبُوا بِخَمِيصَتِي هَذِهِ إِلَى أَبِي جَهْمٍ وَائْتُونِي بِأَنْبِجَانِيَّةِ أَبِي جَهْمٍ فَإِنَّهَا أَلْهَتْنِي آنِفًا عَنْ صَلاَتِي وَقَالَ هِشَامُ بْنُ عُرْوَةَ عَنْ أَبِيهِ عَنْ عَائِشَةَ قَالَ النَّبِيُّ ﷺ كُنْتُ أَنْظُرُ إِلَى عَلَمِهَا وَأَنَا فِي الصَّلاَةِ فَأَخَافُ أَنْ تَفْتِنَنِي