Shih Al Muslim Hadith Number 8

 Abūt-Tāhir Ahmad bin Amr bin Sarh narrated to me, he said, Ibn Wahb narrated to us, he said, Mālik said to me: ‘Know that a man who relates everything he hears is not safe, and he can never be an Imām, as long as he narrates everything he hears’.

Introduction
Hadith number 8
Volume no 1
Chapter: 3 The Prohibition of Narrating Everything One Hears.