The arabic phrase b-ismi-llāhi r-raḥmāni r-raḥīmi which means "In the name of God, the Most Gracious, the Most Merciful" precedes almost every chapter of the Quran.
Popular during the Abbasid Caliphate, the Abjad numerals system adds up the values of the letters in the phrase to 786.
The usage of 786 is extremely popular in South Asia as a talisman, especially popular with motor vehicles.