Say at least three times:

سُبْحَانَ رَبِّيَ الْأَعْلَى وَبِحَمْدِهِ

Subhaana Rabbiyal-A'laa wa bihamdihi

Glory and praise be to my most high Lord.

Reference: Hasan Sanad (Shu'aib Al-Arnaut). Abu Dawud: 870