The word(s) "admonish" appears 27 time(s) in 25 verse(s) in Quran in Abdullah Yusuf Ali translation.

(21) Then see what was the end of those who were admonished (but heeded not),-

(22) And before this, was the Book of Moses as a guide and a mercy: And this Book confirms (it) in the Arabic tongue; to admonish the unjust, and as Glad Tidings to those who do right.

(23) We know best what they say; and thou art not one to overawe them by force. So admonish with the Qur'an such as fear My Warning!

(24) But those who divorce their wives by Zihar, then wish to go back on the words they uttered,- (It is ordained that such a one) should free a slave before they touch each other: Thus are ye admonished to perform: and Allah is well-acquainted with (all) that ye do.

(25) Therefore do thou give admonition, for thou art one to admonish.