ذَٰلِكَ نَتْلُوهُ عَلَيْكَ مِنَ ٱلْـَٔايَـٰتِ وَٱلذِّكْرِ ٱلْحَكِيمِ Qur’an Aal-Imran (3:58)Tha lika natloohu AAalayka mina al a y a ti wa al thth ikri al h akeem i
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.