Beware of Man who Narrates Everything he Hears

وَحَدَّثَنِي أَبُو الطَّاهِرِ، أَحْمَدُ بْنُ عَمْرِو بْنِ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ سَرْحٍ قَالَ أَخْبَرَنَا ابْنُ وَهْبٍ، قَالَ قَالَ لِي مَالِكٌ اعْلَمْ أَنَّهُ لَيْسَ يَسْلَمُ رَجُلٌ حَدَّثَ بِكُلِّ مَا سَمِعَ وَلاَ يَكُونُ إِمَامًا أَبَدًا وَهُوَ يُحَدِّثُ بِكُلِّ مَا سَمِعَ ‏.‏

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’.

Sahih Muslim Introduction 10 https://sunnah.com/muslim/introduction/9

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وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا هُشَيْمٌ، عَنْ سُلَيْمَانَ التَّيْمِيِّ، عَنْ أَبِي عُثْمَانَ النَّهْدِيِّ، قَالَ قَالَ عُمَرُ بْنُ الْخَطَّابِ رضى الله تعالى عنه بِحَسْبِ الْمَرْءِ مِنَ الْكَذِبِ أَنْ يُحَدِّثَ بِكُلِّ مَا سَمِعَ ‏.‏

Yahyā bin Yahyā narrated to us, Hushaym informed us, on authority of Sulaymān at-Taymī, on authority of Abī Uthmān an-Nahdī, he said, Umar bin ul-Khattāb, may Allah be pleased with him, said: ‘It is enough of a lie for a man that he narrates everything he hears’.

Sahih Muslim Introduction 9 https://sunnah.com/muslim/introduction/8