«وَفِيهَا أَيِ الْآحَادِ الْمَقْبُولُ: وَهُوَ مَا يَجِبُ الْعَمَلُ بِهِ عِنْدَ الْجُمْهُورِ»
Among ahad reports are those accepted as maqbul; the majority hold that such reports require action.
Maqbul does not mean that a narration is automatically accepted because it is mashhur or aziz. Acceptance depends on conditions of reliability such as the transmitter’s truthfulness, precision, and the relevant qualities of chain and text.
One must also distinguish the obligation to act on an accepted report from claiming that every accepted ahad report automatically has the same epistemic status as mutawatir. A report may be authoritative for practice while its degree of yielded knowledge remains a further methodological question.