Advice for those who have abandoned their false school of thought

Question:
The questioner says: Some of the people of the misguided sects have now announced that they have abandoned their false school of thought, and some of them are listening to you right now, O Shaykh. Is there any advice for them?

Answer:
We praise and thank Allah for their return from their false school of thought. We ask Allah for their steadfastness and encourage them in that, and we make du'a for them. As for the rest, it is incumbent upon you to call them. It is incumbent upon you to call them to return to the truth and to save them from misguidance. This is a great gain. For if Allah guides one person through you, it is better for you than red camels. This is a great glad tidings. We ask Allah to make them steadfast in their return from misguidance to the truth, and to increase them in insight and knowledge. And it is incumbent upon you to call the rest to follow the path of these people. Yes.