Hisnul Muslim

Chapter 62 - Upon hearing thunder

168 - "How perfect He is, (The One) Whom the thunder declares His perfection with His praise, as do the angles out of fear of Him."

سُبْـحانَ الّذي يُسَبِّـحُ الـرَّعْدُ بِحَمْـدِهِ، وَالملائِكـةُ مِنْ خيـفَته

Subhâna l-ladhî yusabbihu r-racdu bi-hamdihi wa-l-malâ'ikatu min khîfatihi.