آمَنْتُ بِاللَّهِ وَرُسُلِهِ
Transliteration
Amantu billahi wa rusulih
English meaning
I believe in Allah and His messengers. (Said when whisperings arise; spit dryly to the left three times.)
When is it recited?
When whispers come about creed.
Its virtue
The Prophet said: 'When whispering comes, say I believe in Allah and His Messenger, and the whispering will leave.'
Source
Muslim, Iman 209