Tajwīd is a means of guarding the Qur’ān and preserving it from distortion and alteration. Without Tajwīd, the meaning of the Qur’ān would change resulting in words of disbelief. This would also cause the Qur’ān to curse its reader. So, if we recite the Qur’ān in the way Allāh revealed it to Muḥammad ﷺ, we will protect our tongues from uttering that which is sinful.