 he means that she rose at dawn with the remainder of the darkness of the night and the beginning of some daylight. the night does not despair of her for the remainder of it and the day does not surrender her to the night for its beginning so it is as if she is something between two people who are pulling at her. n.
يريد أنها طلعت فى الفجر ببقية من سواد الليل وابتداء شىء من ضوء النهار. فالليل لا ييأس منها لبقيته، والنهار لا يسلمها لليل لابتدائه فكأنها شىء بين اثنين يتجاذبانه ن.