 he made them the crescent moons of a place. because the crescent moons in a year of drought are more subtle in appearance due to the dryness and turbidity of the air. abu zaid said
جعلها أهلة محل . لأن الأهلة فى سنة الجدب أدق فى المنظر ليبس الهواء وكدورته. وقال أبو زيد