An-Nisa · 4:155

155. I distanced them from My mercy because they broke the promise that was taken from them, disbelieved in Allah’s words, boldly killed the prophets and said to Muhammad (peace be upon him), 'Our hearts are covered, so we cannot understand what you say’ That is not the case. Instead, Allah has sealed their hearts so no good reaches them. They only have a little faith, which will not be of any use to them.