O ye who believe! why do you say what you do not? Most hateful is it in the sight of Allah that you say what you do not. (Al Quran 61:2-3)
When a sura is revealed, some [hypocrites] say, ‘Have any of you been strengthened in faith by it?’ It certainly does strengthen the faith of those who believe and they rejoice, but, as for the perverse at heart, each new sura adds further to their perversity. They die disbelieving. Can they not see that they are afflicted once or twice a year? Yet they neither repent nor take heed. Whenever a sura is revealed, they look at each other and say, ‘Is anyone watching you?’ and then they turn away– God has turned their hearts away because they are people who do not use their reason.
A Messenger has come to you from among yourselves. Your suffering distresses him: he is deeply concerned for you and full of kindness and mercy towards the believers. If they turn away, [Prophet], say ,‘God is enough for me: there is no god but Him; I put my trust in Him; He is the Lord of the Mighty Throne.’ (Al Quran 9:124-129)