At-Tawbah · 9:124

124. When Allah revealed a sūrah to the Messenger (peace and blessings be upon him), some of the hypocrites would ask by way of mocking and ridicule; 'Which one of you believers has had his faith increase?' As for those who had faith in Allah, and followed His Messenger, the revelation of the sūrah had indeed increased them in faith, and they were happy because of the benefit it contained for them in this world and for the Afterlife.