أَنْ لَا يَرْوِيَ مِنْهَا إِلَّا مَا عَرَفَ صِحَّةَ مَخَارِجِهِ، وَالسِّتَارَةَ فِي نَاقِلِيهِ، وَأَنْ يَتَّقِيَ مِنْهَا مَا كَانَ مِنْهَا عَنْ أَهْلِ التُّهَمِ وَالْمُعَانِدِينَ مِنْ أَهْلِ الْبِدَعِ
Translation: He should report only what he knows to have sound provenance and appropriately upright transmitters, and guard against reports from accused persons and obstinate partisans of innovations.
“Sound provenance” concerns the report’s valid transmission route; “sitarah” indicates the narrators’ protected moral standing and probity, not simply that their faults are concealed. Grammatically, “and that he avoid” is coordinated with “that he should not narrate except”: responsible selection and avoidance form one duty.