For more detail about Idgham without ghunnah please visit: https://alphabet.quranacademy.org/en/lesson/tajweed/nun-with-sukun-and-tanween/idgham https://riwaqalquran.com/blog/what-is-idgham-in-tajweed/ https://nooracademy.com/idghaam https://kalimah-center.com/types-of-idgham/