سُبْحَانَ ٱللَّٰهِ
Holy Qur'an
Al-Qur'an
Kids Qur'an
The letters ta, sin and mim are among the mysterious, disjointed letter-symbols (al-muqatta'at) preceding some of the chapters of the Qur'an (see Appendix II).
This is a combination of three Abbreviated Letters, as to which, generally, see Appendix I, printed at the end of S.ii.