The Messenger of Allah ﷺ forbade combing the hair except every second day.  

نَهَى رَسُولُ اللَّهِ ﷺ عَنِ التَّرَجُّلِ إِلاَّ غِبًّا  

A man from the companions of the Prophet ﷺ travelled to Fudalah ibn Ubayd when he was in Egypt. He came to him and said: I have not come to you to visit you. But you and I heard a tradition from the Messenger of Allah ﷺ. I hope you may have some knowledge of it. He asked: What is it? He replied: So and so. He said: Why do I see you dishevelled when you are the ruler of this land? He said: The Messenger of Allah ﷺ has forbidden us to indulge much in luxury. He said: Why do I see you unshod? He replied: The Prophet ﷺ used to command us to go barefoot at times.  

أَنَّ رَجُلاً مِنْ أَصْحَابِ النَّبِيِّ ﷺ رَحَلَ إِلَى فَضَالَةَ بْنِ عُبَيْدٍ وَهُوَ بِمِصْرَ فَقَدِمَ عَلَيْهِ فَقَالَ أَمَا إِنِّي لَمْ آتِكَ زَائِرًا وَلَكِنِّي سَمِعْتُ أَنَا وَأَنْتَ حَدِيثًا مِنْ رَسُولِ اللَّهِ ﷺ رَجَوْتُ أَنْ يَكُونَ عِنْدَكَ مِنْهُ عِلْمٌ قَالَ وَمَا هُوَ قَالَ كَذَا وَكَذَا قَالَ فَمَا لِي أَرَاكَ شَعِثًا وَأَنْتَ أَمِيرُ الأَرْضِ قَالَ إِنَّ رَسُولَ اللَّهِ ﷺ كَانَ يَنْهَانَا عَنْ كَثِيرٍ مِنَ الإِرْفَاهِ قَالَ فَمَا لِي لاَ أَرَى عَلَيْكَ حِذَاءً قَالَ كَانَ النَّبِيُّ ﷺ يَأْمُرُنَا أَنْ نَحْتَفِيَ أَحْيَانًا  

The Companions of the Messenger of Allah ﷺ mentioned this word before him. The Messenger of Allah ﷺ said: Listen, listen! Wearing old clothes is a part of faith, wearing old clothes is a part of faith. Abu Dawud said: He is Abu Umamah b. Tha'labat al-Ansari  

ذَكَرَ أَصْحَابُ رَسُولِ اللَّهِ ﷺ يَوْمًا عِنْدَهُ الدُّنْيَا فَقَالَ رَسُولُ اللَّهِ ﷺ أَلاَ تَسْمَعُونَ أَلاَ تَسْمَعُونَ إِنَّ الْبَذَاذَةَ مِنَ الإِيمَانِ إِنَّ الْبَذَاذَةَ مِنَ الإِيمَانِ يَعْنِي التَّقَحُّلَ