15وَلَقَد كانوا عاهَدُوا اللَّهَ مِن قَبلُ لا يُوَلّونَ الأَدبارَ ۚ وَكانَ عَهدُ اللَّهِ مَسئولًاJ. M. RodwellThey had before pledged themselves to God that they would not turn their backs; and a pledge given to God must be enquired of.