سُبْحَانَ ٱللَّٰهِ
Holy Qur'an
Al-Qur'an
Kids Qur'an
Lit., "This We convey unto thee of the messages and of the wise tiding." The expression "this of the messages" bears, to my mind, the connotation of one particular message - namely, the one which follows immediately after this sentence.
As a testament to your prophethood.