Hadith 17:227
Al-Thaqafi narrated to us, from Ayyub, from Abu Qilabah, who said: Do not narrate the hadith to one who does not know 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 من لا يعرفه فإن من لا يعرفه يضره ولا ينفعه