((لاَ إِلَهَ إِلاَّ اللَّهُ وَاللَّهُ أَكْبَرُ، لاَ إِلَهَ إِلاَّ اللَّهُ وَحْدَهُ، لاَ إِلَهَ إِلاَّ اللَّهُ وَحْدَهُ لاَ شَرِيكَ لَهُ، لاَ إِلَهَ إِلاَّ اللَّهُ لَهُ المُلْكُ وَلَهُ الْحَمْدُ، لاَ إِلَهَ إِلاَّ اللَّهُ وَلاَ حَوْلَ وَلاَ قُوَّةَ إِلاَّ بِاللَّهِ)).
(None has the right to be worshipped except Allah and Allah is the greatest.None has the right to be worshipped except Allah, alone.None has the right to be worshipped except Allah, alone, without partner.None has the right to be worshipped except Allah, to Him belongs all sovereignty and praise. None has the right to be worshipped except Allah and there is no might and no power except with Allah.)
At-Tirmidhi and Ibn Majah. See also Al-Albani, Sahih At-Tirmidhi 3/152 and Sahih Ibn Majah 2/317.