So, for example of the adhaan, remains in the form in which it was legislated, without addition or subtraction. This is an authentic hadeeth, reported by al-Bukhaaree in his Saheeh. Indeed they have permitted it and kept quiet about it. The writing of Tafseer of the Qur'aan and the Hadeeth. It is the way which revived the hearts of the pioneers of this Ummah.
Verily man is in loss.
Except those who believe and do righteous deeds and help one another to the truth and help one another to patience.