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
suyuti:13689a –
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السيوطي:١٣٦٨٩a –

"خَزَائن اللَّه تَعَالَى الْكَلَامُ، إِذَا أَرَادَ شَيْئًا يَقُولُ لَهُ: كُنْ فَيَكُونُ".  

أَبو الشيخ في العظمة: عن أَبى هريرة

See similar narrations below:

Collected by Qurʾān
quran:36:82 –

His command is only when He intends a thing that He says to it, "Be," and it is.  

His command, His affair, when He wills a thing, that is, ˹when He will˺ to create something, is just to say to it ‘Be’, and it is (a variant reading ˹for fa-yakūnu˺ has fa-yakūna, as a supplement to yaqūla, ‘to say’).
القرآن:٣٦:٨٢ –

إِنَّمَا أَمْرُهُ إِذَا أَرَادَ شَيْئًا أَنْ يَقُولَ لَهُ كُنْ فَيَكُونُ  

{إنما أمره} شأنه {إذا أراد شيئا} أي خلق شيء {أن يقول له كن فيكونُ} أي فهو يكون، وفي قراءة بالنصب عطفا على يقول.