Say three times:

اَللَّهُ أَكْبَرُ كَبِيرًا، اَللَّهُ أَكْبَرُ كَبِيرًا، اَللَّهُ أَكْبَرُ كَبِيرًا، وَالْحَمْدُ لِلَّهِ كَثِيرًا، وَالْحَمْدُ لِلَّهِ كَثِيرًا، وَالْحَمْدُ لِلَّهِ كَثِيرًا، وَسُبْحَانَ اللَّهِ بُكْرَةً وَأَصِيلًا

Allahu 'Akbar Kabeera, Allahu 'Akbar Kabeera, Allahu 'Akbar Kabeera, walhamdu lillaahi katheera, walhamdu lillaahi katheera, walhamdu lillaahi katheera, wa SubhaanAllahi bukratan wa'aseela

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.

Reference: Hasan li gairihi (Shu'aib Al-Arnaut). Abu Dawud: 764