A man asked `Umar ibn al-Khattab, “O Commander of the Faithful! What is the meaning of `Glory be to Allah’ [subhan Allah]?” He replied, “Verily, there is a man within these walls who informs when asked, and informs when there is silence.” So the man entered and it was `Ali ibn Abu Talib (AS); hence, he asked, “O Father of Hasan! What is the meaning of `Glory be to Allah’?” He (AS) answered, “It is revering the Glory of Allah, the Mighty and High, and the negation of whatever every polytheist attributes to Him. Therefore, when a servant says this, all the angels bless him.”