You must hold to the original…
Al-Kāfi|Volume 8|Book 1|Chapter 350
عَنْهُ عَنِ ابْنِ مُسْكَانَ عَنْ رَجُلٍ مِنْ أَهْلِ الْجَبَلِ لَمْ يُسَمِّهِ قَالَ قَالَ أَبُو عَبْدِ اللَّهِ (عليه السلام) عَلَيْكَ بِالتِّلَادِ وَ إِيَّاكَ وَ كُلَّ مُحْدَثٍ لَا عَهْدَ لَهُ وَ لَا أَمَانَةَ وَ لَا ذِمَّةَ وَ لَا مِيثَاقَ وَ كُنْ عَلَى حَذَرٍ مِنْ أَوْثَقِ النَّاسِ فِي نَفْسِكَ فَإِنَّ النَّاسَ أَعْدَاءُ النِّعَمِ.
350. From him, from Ibn Muskaan, from a man from the people of Al-Jabl whom he did not name, has narrated the following: Abu Abdullah عليه الصلاة والسلام said: ‘It is on you to be with the original, and beware of every newly invented matter as there is no pledge for it, nor a trust for it, nor a guarantee for it, nor a Covenant for it. And be cautious of the people whom you rely upon for yourself, for the people are the enemies of the bounties’.
- Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (16/224)
- Ṣaḥīḥ al-Kāfī