The noble Shaikh 'Abdul-'Azeez ibn Baaz (Rahimahuallaah), he mentioned that Shaikh Rabee' is from the best of the people of the Sunnah, and that he is well known to him for his knowledge, excellence, and for good and correct 'aqeedah, that he has no doubt that he is from the people of the Sunnah and the Jamaa'ah, that he is well know to him for rectitude, knowledge and correct 'aqeedah, And Shaikh Ibn Baaz advised him with calling to Allaah and to continue refuting those who oppose the way of the Salaf, and that he should persevere patiently upon that, and Shaikh Ibn Baaz advised the students of knowledge that they should benefit from the books of Shaikh Rabee'.
[The Status of the People of Hadeeth (the Ahlul-Hadeeth) Their Feats and Praiseworthy Effects in the Religion]