The Legitimacy of the Science of Tajwid and Its Rules

Our brother also asks about the legitimacy of the science of tajwid and the rules contained in this science, among which is: that the ghunnah is extended by the amount of one vowel movement?
Answer: Tajwid is received (talaqqi) from the Companions of the Prophet (peace and blessings be upon him). The Companions received the Qur'an from those above them, and they received it from those above them from the Companions of the Prophet (peace and blessings be upon him). The Companions of the Prophet (peace and blessings be upon him) received it from their Prophet (peace and blessings be upon him). Thus, it is a reading transmitted from the Companions of the Prophet (peace and blessings be upon him) and those after them until it reached us.
Therefore, what is prescribed for the believer is to read as he received it from the teachers of recitation; because in this lies the improvement of the recitation and the tajwid of the words of the Qur'an, so that he conveys them as they were revealed. The ghunnah, the izhar, and the ikhfa, all of this is among the improvements, not among the obligatory matters, but rather it is the improvement of the words and the care for the recitation in the best manner. The Prophet (peace and blessings be upon him) encouraged people to excel in recitation, and he said (peace and blessings be upon him): meaning: he beautifies his voice by raising it. It is also established from him (peace and blessings be upon him) that he said: , meaning: beautify your voices with it, so that the listener finds it pleasant, so that the listener is at ease with it, and so that the listener benefits from it. Thus, tajwid is among the prescribed matters for improving the recitation, for its impact on the hearts, and for taking pleasure in it. This includes what relates to the ghunnah, what relates to the mad (elongations), and what relates to tafkhim (heaviness) and tarqiq (lightness)... and so on. Yes.
The presenter: May Allah reward you.