الْخَبَرُ الثَّابِتُ عَلَى أَلْسِنَةِ قَوْمٍ لَا يُتَصَوَّرُ تَوَاطُؤُهُمْ
A mutawātir report is established among such a group that collusion on falsehood is not realistically conceivable.
Here the word qawm does not merely identify a specific tribe. The issue is whether the group and its pattern of transmission exclude a jointly fabricated report under the relevant circumstances.
Tawāṭuʾ means concerted agreement or collusion. If many people merely repeat one person's unsupported story, the number of repeaters does not create the same independence as numerous genuine witnesses. The relationships among transmitters matter as much as their number.