ENOfficial
This hadith has been narrated on the authority of Simak with the same chain of transmitters. and Simak said: I heard my brother say that jabir had stated: Be on your guard against them.
Source: sunnah.com
Other translations
Arabic
وَحَدَّثَنِي ابْنُ الْمُثَنَّى، وَابْنُ، بَشَّارٍ قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ سِمَاكٍ، بِهَذَا الإِسْنَادِ مِثْلَهُ . قَالَ سِمَاكٌ وَسَمِعْتُ أَخِي، يَقُولُ قَالَ جَابِرٌ فَاحْذَرُوهُمْ .
sunnah.com