Opening supplication — I have turned my face
إِنِّـي وَجَّـهْتُ وَجْهِيَ لِلَّذي فَطَرَ السَّمَاواتِ...
إِنِّـي وَجَّـهْتُ وَجْهِيَ لِلَّذي فَطَرَ السَّمَاواتِ وَالأَرْضَ حَنيفاً وَما أَنا مِنَ المُشْرِكين، إِنَّ صَلاتي وَنُسُكي وَمَحْيايَ وَمَماتي للهِ رَبِّ العالَمين، لا شَريكَ لَهُ وَبِذَلِكَ أُمِرْتُ وَأَنا مِنَ المُسْلِمين، اللّهُمَّ أَنْتَ الْمَلِكُ لا إِلَهَ إِلاَّ أَنْت
Innee wajjahtu wajhiya lillathee fataras-samawati wal-ard haneefan wama ana minal-mushrikeen, inna salatee wanusukee wamahyaya wamamatee lillahi rabbil-AAalameen, la shareeka lahu wabathalika omirtu wa-ana minal-muslimeen, allahumma antal-maliku la ilaha illa ant
Translation
I have turned my face sincerely towards He who has originated the heavens and the earth, and I am not of the polytheists. My prayer, sacrifice, life and death are all for Allah, Lord of the worlds, no partner has He. With this I am commanded and I am of the Muslims. O Allah, You are the King, none has the right to be worshipped except You.
When to recite
One of the opening supplications recited after the opening takbeer.
Source / Reference
Muslim 1/534