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:55:5 –

The sun and the moon ˹move˺ by precise calculation,  

The sun and the moon follow a reckoning, they move according to a ˹strict˺ calculation,
القرآن:٥٥:٥ –

الشَّمْسُ وَالْقَمَرُ بِحُسْبَانٍ  

{الشمس والقمر بحسبان} يجريان.

See similar narrations below:

Collected by Qurʾān
quran:75:9 –

And the sun and the moon are joined,  

and the sun and the moon are brought together, so that both of them will rise from the west; or ˹it means when˺ the light of both of them disappears — and this will be on the Day of Resurrection —
القرآن:٧٥:٩ –

وَجُمِعَ الشَّمْسُ وَالْقَمَرُ  

{وجمع الشمس والقمر} فطلعا من المغرب أو ذهب ضوءهما وذلك في يوم القيامة.