Allah Taala states in the Quran Majeed:
“And recite the Quran with measure.”
In the commentary of this verse, Hazrat Ali RA.
states: *Tar,teel means to know the Tajweed of the letters and to recognize the places of pausing.”
In another place, Allah Ta’ala says:
“And with measure have We revealed it (the Quran).’
In a Hadlth it has been narrated:
“Allah desires that the Quran be recited In the manner it was revealed” Since the Quran was revealed ‘with Tajweed, it Is compulsory to recite the Quran
with Tajweed. We also know that Allah Taala has made it compulsory upon us to learn Tajweed because without the knowledge of Tajweed, we will not be able to recite the Quran with Tajweed. If we do not do so, then we are liable to be sinful especially those that do not care, for it is narrated that many are they who recite the Quran, while the Quran curses them.