Shaykh Rabee – may Allah preserve him and reward him with good – was asked about taking knowledge from those upon the Salafi Manhaj; he said:
If he was upon the Salafi Manhaj and didn’t have any misguidance (with him) and he calls to the Salafi Manhaj, then it is obligatory that knowledge is taken from him and it is not taken from the people of falsehood.
The salaf used to say: Indeed this knowledge is religion so look (beware) of whom you take your religion from. And if a man used to speak (about the religion) they would say to him: “Name us your men” so if they were people of innovation (that he named) they would not take (any knowledge) from him and if they were from the people of sunnah, then (the salaf) would take from him.
Therefore the religion of Allah is not taken from the people of falsehood, because they are the people of deception and they mix falsehood with truth, so as to propagate their falsehood.
So it is upon the student that he is diligent in taking knowledge from its pure unadulterated sources, from the Salafi books, from those who teach these books and from the sincere truthful ardent ones who spread the Sunnah of the Messenger of Allah – peace and blessings upon him – and spread his correct methodology. And from those who are sincere, truthful and ardent upon guiding the people and saving them from misguidance and from the destructive paths.
Al-Lubbaab min majmoo’ nasaaih wa tawjihaat. Page 185