READ HERE: the-statement-of-a-single-scholar-is-enough-to-establish-a-criticism-jarh.pdf
The Statement of a Single Scholar is Enough to Establish a Criticism (Jarh)
The virtuous Shaykh, Al-Allamah Rabee al-Madkhali حفظه الله said:
It is sufficient for a Jarh (to be accepted) that it is made by a single scholar.
He حفظه الله also said:
If a single scholar brings forth proof and tens (of people) oppose him with falsehood, lying and tricks, then no attention is to be paid to them.
[وصية سماحة الشيخ العلامة المحدث : ربيع بن هادي المدخلي لطلاب العلم السلفيين]
https://ar.alnahj.net/audio/1532
He حفظه الله also said:
If a single person criticises with a substantial criticism and another person opposes (this criticiser) and praises the one being criticised, then the one praising will be dropped and his speech will become null and void.
[أســـئلة وأجـــوبة مهمـــة في علـــوم الحديث]
http://www.rabee.net/ar/articles.php?cat=11&id=271
Translator: Yasar A. Rahman