Hadith 17:326
Al-Thaqafi narrated to us, from Ayyub, from Abu Qilabah, who said: Do not narrate the hadith except to one who knows it, for whoever does not know it, it harms him and does not benefit him.
حدثنا الثقفي عن أيوب عن أبي قلابة قال لا تحدث بالحديث الا من يعرفه فإن من لا يعرفه يضره ولا ينفعه