they need to be preceded by a harakah that is homogenous with the letter.

By carefully examining this word, it is clear that the three letters of Madd need to fulfill two conditions Letters of Maddīefore we expound on Madd rules in Tajweed, we will mention the three letters of Madd (واي) that are found in: ( نُوحِيهَا).

Hence, Madd in Tajweed refers to the extension or the stretching of sounds with one of three letters. Madd in Tajweed could be better understood in the light of its linguistic meaning which is to increase or lengthen.