A noteworthy collection of fatāwá from al-ʿAllāmah, Ṣāliḥ ibn Fawzān al-Fawzān establishing the guidelines with regards to how one deals with the various duʿāʾt (callers) along with offering the prophetic guidance which foretold of callers at the gates of Hell calling the people to misguidance and a grievous torment. Towards the end, there are also fatāwá with regards to the world famous Jamāʿat al-Tablīgh and their station in the field of daʿwah.
And the individuals who ascribe themselves to the daʿwah, it is obligatory to look into them: Where did they study? Who did they take knowledge from? Where did they come from? What is their ʿaqīdah (creed)? And their dealings and effects amongst the people must be looked into. And it must be asked, what did they do which resulted in goodness? And which of their actions brought about rectification? It is obligatory to study their conditions before becoming deluded by their statements and their outward conditions. There is no doubt about this affair, especially in this time which contains many duʿāʾt (callers) to fitnah.