لَا إِلَهَ إِلَّا اللهُ وَحْدَهُ لَا شَرِيكَ لَهُ، لَهُ الْمُلْكُ وَلَهُ الحَمدُ، وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِيرٌ، سُبْحَانَ اللهِ، وَالحَمدُ للهِ، وَلَا إِلَهَ إِلَّا اللهُ وَاللهُ أَكْبَرُ، وَلَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللهِ الْعَلِيِّ الْعَظِيمِ، رَبِّ اغْفِرْ لِي

There is none worthy of worship but Allāh alone, Who has no partner, His is the dominion and to Him belongs all praise, and He is able to do all things. Glory is to Allāh. Praise is to Allāh. There is none worthy of worship but Allāh. Allāh is the Most Great. There is no might and no power except by Allāh's leave, the Exalted, the Mighty. My Lord, forgive me. (Whoever says this will be forgiven, and if he supplicates to Allāh, his prayer will be answered; if he performs ablution and prays, his prayer will be accepted.)

Reference: Al-Bukhārī (#1154), see Fatḥ al-Bārī (3/39). The wording is of Ibn Mājah (#3878), also see Ṣaḥīḥ Ibn Mājah (2/335).