Subḥānaka Allāhumma wa biḥamdika,'ash-hadu 'an lā 'ilāha 'illā 'Anta,'astaghfiruka wa 'atūbu 'ilayk.
Glory is to You, O Allah, and praise; I bear witness that there is noneworthy of worship but You. I seek Your forgiveness and turn to You inrepentance.
Reference:
An-Nasa'i, 'Amalul-Yawm wal-Laylah, p. 173. See also Al-Albani, 'Irwa'ul-Ghalil 1/135 and 2/94.
Hisnul Muslim 15