Allah informs Prophet Muhammad that a mosque has been built to pervert the teachings of Islam, and it is there that the hypocrites congregate 9:107-110
9:107 And there are those who have taken a mosque to cause harm, disbelief, and to divide the believers, and as a place of ambush for those who fought Allah and His Messenger before. They swear, 'We desired nothing but good', but Allah bears witness that they are liars.
9:108 You shall never stand there. A mosque founded upon piety from the first day is worthier for you to stand in. In it are men who love to purify themselves. Allah loves those who purify themselves.
9:109 Is he who founds his building on the fear of Allah and His pleasure, better or he who founds his building on the brink of a crumbling edge so that it will tumble with him into the Fire of Gehenna? Allah does not guide the harm doers.