Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:97:5 –

Peace it is until the emergence of dawn.  

It is peaceful (salāmun hiya: a predicate preceding the subject) until the rising of the dawn (read matla‘ or matli‘), until the time it rises: it is peaceful because of the numerous salutations ˹of peace˺ (salām) spoken in it by the angels, who, every time they come across a believing man or believing woman, bid him peace. Meccan or Medinese, consisting of 8 verses.
القرآن:٩٧:٥ –

سَلَامٌ هِيَ حَتَّىٰ مَطْلَعِ الْفَجْرِ  

{سلام هي} خبر مقدم ومبتدأ {حتى مطلع الفجر} بفتح اللام وكسرها إلى وقت طلوعه، جُعلت سلاما لكثرة السلام فيها من الملائكة لا تمر بمؤمن ولا مؤمنة إلا سلمت عليه.