There are two things with which some people corrupt their prayers. The first thing is saying ‘tabaraka ismuka wa ta’ala jadduka’ which means ‘Blessed is Thy name and High isThy Fortune.’ This is what the genies said about God out of ignorance and God has stated it quoting them. The second thing is saying ‘as-salamu alayna va ala ebadillah as-salihin’ which means ‘Peace be upon us and upon God’s servants - the good-doers’ in the middle of the prayer (since this is said at the end to terminate the prayers). ”