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:2:117 –

Originator of the heavens and the earth. When He decrees a matter, He only says to it, "Be," and it is.  

Creator of the heavens and the earth, making them exist without any exemplary precedent; and when He decrees, wills, a thing, to exist, He but says to it ‘Be’ and it is, that is to say, it becomes (fa-yakūnu: a variant reading has fa-yakūna, on account of it being the response ˹in the subjunctive mood˺ to the jussive statement).
القرآن:٢:١١٧ –

بَدِيعُ السَّمَاوَاتِ وَالْأَرْضِ ۖ وَإِذَا قَضَىٰ أَمْرًا فَإِنَّمَا يَقُولُ لَهُ كُنْ فَيَكُونُ  

{بديع السماوات والأرض} موجدهم لا على مثال سبق {وإذا قضى} أراد {أمرا} أي إيجاده {فإنما يقول له كن فيكون} أي فهو يكون وفى قراءة بالنصب جوابا للأمر.

See similar narrations below:

Collected by Qurʾān
quran:40:68 –

He it is who gives life and causes death; and when He decrees a matter, He but says to it, "Be," and it is.  

He it is Who gives life and brings death. So when He decides upon a matter, ˹when˺ He wants to bring something into existence, He only says to it ‘Be!’ and it is (read fa-yakūnu, or fa-yakūna ˹in the subjunctive˺ on account of an implied ˹preceding˺ an). In other words, it comes into existence after He has willed it, that which is signified by the said words.
القرآن:٤٠:٦٨ –

هُوَ الَّذِي يُحْيِي وَيُمِيتُ ۖ فَإِذَا قَضَىٰ أَمْرًا فَإِنَّمَا يَقُولُ لَهُ كُنْ فَيَكُونُ  

{هو الذي يحيى ويُميت فإذا قضى أمرا} أراد إيجاد شيء {فإنما يقول له كن فيكون} بضم النون وفتحها بتقدير أن، أي يوجد عقب الإرادة التي هي معنى القول المذكور.