They that is the angels fear yakhāfūna is a circumstantial qualifier referring to the person governing the verb yastakbirūna ‘they are not arrogant’ their Lord from above them min fawqihim is a circumstantial qualifier referring to the suffixed pronoun -hum of fawqihim in other words they fear their Lord being High above them with the power to subjugate and they do what they are commanded to do.