[Machine] On the authority of the Prophet ﷺ , anyone who lets their hair grow long should shave it, as the act of shaving has become obligatory upon them. Abu Sa'ad Al-Sufi informed us that Abu Ahmad ibn Adi narrated to us, who was informed by Ahmad ibn Ali Al-Madaini, who was informed by Yunus ibn Abdul A'la, who informed me Abdullah ibn Nafi' through Asim. And Asim ibn Umar is weak and this hadith cannot be considered as elevated in status.  

عَنِ النَّبِيِّ ﷺ مَنْ لَبَّدَ رَأْسَهُ فَلْيَحْلِقْ فَقَدْ وَجَبَ عَلَيْهِ الْحِلَاقُ أَخْبَرَنَاهُ أَبُو سَعْدٍ الصُّوفِيُّ أنبأ أَبُو أَحْمَدَ بْنُ عَدِيٍّ ثنا أَحْمَدُ بْنُ عَلِيٍّ الْمَدَائِنِيُّ ثنا يُونُسُ بْنُ عَبْدِ الْأَعْلَى أَخْبَرَنِي عَبْدُ اللهِ بْنُ نَافِعٍ عَنْ عَاصِمٍ فَذَكَرَهُ وَعَاصِمُ بْنُ عُمَرَ ضَعِيفٌ وَلَا يَثْبُتُ هَذَا مَرْفُوعًا