Letters are mentioned in the Quran in these verses:
[10:1] A.L.R. These (letters) are the proofs of this book of wisdom.
[12:1] A.L.R. These (letters) are proofs of this profound scripture.
[13:1] A. L. M. R. These (letters) are proofs of this scripture. What is revealed to you from your Lord is the truth, but most people do not believe.
[15:1] A.L.R. These (letters) are proofs of this scripture; a profound Quran.
[26:1] T. S. M. (Ta, Seen, Mim)
[26:2] These (letters) constitute proofs of this clarifying scripture.
[27:1] T. S. These (letters) constitute proofs of the Quran; a profound scripture.
[28:1] T. S. M.
[28:2] These (letters) constitute proofs of this profound book.
[31:1] A. L. M.
[31:2] These (letters) constitute proofs of this book of wisdom.
To learn more, read the Quran in English.
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