Reference : Hisn al-Muslim 31

اللهُ أَكْبَـرُ كَبـيرا ،
اللهُ أَكْبَـرُ كَبـيرا ،
اللهُ أَكْبَـرُ كَبـيرا ،
وَالْحَـمْدُ للهِ كَثـيرا ،
وَالْحَـمْدُ للهِ كَثـيرا ، 
وَالْحَـمْدُ للهِ كَثـيرا ، 
وَسُبْـحانَ اللهِ بكْـرَةً وَأَصيـلا.( ثَلاثاً )
أَعـوذُ بِاللهِ مِنَ الشَّـيْطانِ
مِنْ نَفْخِـهِ وَنَفْـثِهِ وَهَمْـزِه
Allāhu 'Akbar Kabīra, 
Allāhu 'Akbar Kabīra, 
Allāhu 'Akbar Kabīra, 
walḥamdu lillāhi kathīra, 
walḥamdu lillāhi kathīra, 
walḥamdu lillāhi kathīra, 
wa Subḥānallāhi bukratan wa'aṣīla.[Recite three times in Arabic.] 
'A `ūdhu billāhi min ash-shayṭān
min nafkhihi, wa nafthihi, wa hamzihi.


Allah is the Greatest, Most Great. 
Allah is the Greatest, Most Great. 
Allah is the Greatest, Most Great. 
Praise is to Allah, abundantly. 
Praise is to Allah, abundantly. 
Praise is to Allah, abundantly. 
Glory is to Allah, at the break of day and at its end. [Recite three times in Arabic.] 
I seek refuge in Allah from Satan. 
From his breath, and from his voice, and from his whisper.

Reference:
Abu Dawud 1/203, Ibn Majah 1/265, ai Ahmad 4/85. Muslim recorded a similar 
Hadil 1/420.

Chapter: At the start of the prayer (after takbeer)