Al-Adab Al-Mufrad: Supplication – Hadith No. 710 — When you go to an awesome ruler and fear that he will attack you, say, ‘Allah… (Hadith No. 710)

Ibn 'Abbas said, "When you go to an awesome ruler and fear that
he will attack you, say, 'Allah is greater. Allah is mightier than all
His creation and Allah is greater than all that is feared and all that
you are wary of. I seek refuge with Allah. There is no god but Him, the
One who keeps the seven heavens from falling onto the earth by nothing
except His permission, from the evil of your slave so-and-so and his armies
and followers and supporters, both among jinn and men. O Allah, be my protector
against their evil. Your praise is great and Your protection is immense,
Blessed is Your Name. There is no god but You' three times."

Explanation:

Reference: Al-Adab Al-Mufrad, Supplication, Hadith No. 710