Al-Amash is a reliable narrator who is found in Bukhari HERE. However, I have read in an online source that Ibn Hajar has rejected the narrations of Al-Amash in which he quoted Abu Muawiyyah bin Abdur Rahman. It is said that Ibn Hajar has stated that all the narrations in which Al-Amash quoted Abu Muawiyyah bin Abdur Rahman are Munkir!
I have read that these statements of Ibn Hajr are written in his book Tahdhib Al-Tahdhib by Imam Ibn al-Hajar al Asqalani, volume 3, Page 351.
I do not have access to this book. It will be very, very kind of someone if anyone can please check whether Ibn Hajar really rejected Al-Amash's narrations in which he quoted Abu Muawiyyah bin Abdur Rahman?
Thanks in advance!