It remained with him throughout his tenure as caliph ( 10 years ) .
Prior to his death , Abu Bakr gave this authorized copy of the Qur'an to Umar -- his successor as caliph .
Qur'an remained with Abu Bakr throughout Abu Bakr 's tenure as caliph ( 10 years ) .
Prior to his death , Abu Bakr gave this authorized copy of the Qur'an to Umar -- his successor as caliph .