2 — Allah Most High says:
“O you who believe, if an evildoer brings you any news, verify it (6).” [al-Hujurāt: 6]
In another reading, it is: “make certain”—that is, through careful verification (1).
This therefore establishes decisively and conclusively that the report of a single trustworthy narrator must be accepted and requires no further verification, since such a narrator does not fall under the category of an evildoer. Had his report not imparted knowledge, verification would have been commanded in every case until knowledge was attained (2).
3 — Allah Most High says:
“O you who believe, obey Allah and obey the Messenger and those in authority among you. If you disagree over anything, refer it to Allah and the Messenger (59).” [al-Nisā’: 59]
Ibn al-Qayyim said: “The Muslims unanimously agree that referring a matter to the Messenger meant turning to him during his lifetime and means turning to his Sunnah after his death. They also agree that the obligation to refer matters to him did not cease with his death. If neither his mass-transmitted reports nor his individual reports imparted knowledge or certainty, there would be no point in referring matters to him” (3).
As for the evidence from the Sunnah, it is exceedingly abundant; I shall mention only some of it:
1 — The Prophet—peace and blessings be upon him—would send his messengers to kings, one after another, and likewise his governors to the various regions. The people would refer to them concerning all practical and doctrinal rulings. Thus, he sent Abū Ubayda Āmir ibn al-Jarrāh—may Allah be pleased with him—to the people of