Complex sentence: In this chapter, Allah takes an oath by the sky and "At-Tariq" to say that there is an assigned watcher over every human being and all the deeds and sins done by human beings are being recorded.
Split into simpler sentences: In this chapter, Allah takes an oath by the sky and At-Tariq to say that, there is an assigned watcher over every human being. All his deeds and sins done by human beings are being recorded.