Reference: al-Hath ‘alaa Talabil-‘Ilm – Page 45
Siyar A’laam an-Nubalaa – Volume 15, Page 436
al-Hifth – Ahammiyyatuhu, ‘Ajaa.ibuhu, Tareeqatuhu, Asbaabuhu – Page 12
It has been narrated:
When Abu ‘Abdullaah ‘Abdur-Rahmaan ibn Ahmad al-Khuttootee (died 335AH) arrived in al-Basrah (Iraq), he had no books with him. He remained in al-Basrah for some months until his books arrived. Thereafter he said:
I narrated 50,000 hadeeth from memory until my books arrived.