The chapter
Even at Jahiliyya's darkest, the fitrah did not go extinct. The Prophet ﷺ taught the foundation: "every newborn is born upon the fitrah" (Bukhari 1358), the original imprint of tawhid; and scattered across Arabia a few souls refused to let that imprint be erased. The tradition calls them the hunafa, after the word the Qur'an uses for Ibrahim: hanif, inclined away from every false object of worship toward the One.
The best documented is Zayd ibn Amr ibn Nufayl, uncle of Umar and father of Sa'id. Bukhari preserves his story in close detail: he met the young Muhammad ﷺ before revelation and refused meat slaughtered for idols; he told Quraysh to their faces that the sheep Allah created, watered by Allah's rain, deserved better than their stones; he traveled to Sham questioning rabbis and monks until a scholar told him the religion he sought, the hanifiyyah of Ibrahim, had no living community, but a prophet was about to rise in his own land. He came home saying: "O Allah, bear witness that I am upon the religion of Ibrahim." He rescued infant daughters from live burial, raising them and returning them grown to fathers who had wanted them dead. He died before Iqra, and the Prophet ﷺ said he will be raised on the Day of Rising "a nation by himself."
Waraqah ibn Nawfal took the book-road instead: Christian scripture, until age took his eyes, and the first revelation was carried to his lap for identification. Salman walked the longest road of all, out of Persia's fire-temples through a chain of dying monks, each pointing forward. Different roads, one refusal, and one direction of waiting.
The Codex gives the hunafa their own chapter for a precise doctrinal reason: they prove that the darkness was a choice. No revelation had reached that generation, yet the fitrah plus honest reasoning was enough to reject the stones, honor the daughters, and point a man's face toward the Lord of Ibrahim. Heaven does not ignore such pointing: one seeker got the answer at Hira within his own city, one identified it in his old age, and one crossed an empire to kneel in its city. The age of ignorance was never an excuse; it was a test with a passing grade on record.