Sura al-Baqara 2:43

وَأَقِيمُوا۟ ٱلصَّلَوٰةَ وَءَاتُوا۟ ٱلزَّكَوٰةَ وَٱرْكَعُوا۟ مَعَ ٱلرَّٰكِعِينَ

wa-aqīmū l-ṣalāta wa-ātū l-zakāta wa-arkaʿū maʿa l-rākiʿīna

And be steadfast in prayer; practise regular charity; and bow down your heads with those who bow down (in worship).

Sura Āl-ʿImrān 3:43

يَٰمَرْيَمُ ٱقْنُتِى لِرَبِّكِ وَٱسْجُدِى وَٱرْكَعِى مَعَ ٱلرَّٰكِعِينَ

yā-maryamu uqnutī li-rabbiki wa-usjudī wa-urkaʿī maʿa l-rākiʿīna

"O Mary! worship Thy Lord devoutly: Prostrate thyself, and bow down (in prayer) with those who bow down."

Sura al-Ḥajj 22:77

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ ٱرْكَعُوا۟ وَٱسْجُدُوا۟ وَٱعْبُدُوا۟ رَبَّكُمْ وَٱفْعَلُوا۟ ٱلْخَيْرَ لَعَلَّكُمْ تُفْلِحُونَ

yā-ayyuhā lladhīna āmanū irkaʿū wa-isjudū wa-iʿbudū rabbakum wa-ifʿalū l-khayra la-ʿallakum tufliḥūna

O ye who believe! bow down, prostrate yourselves, and adore your Lord; and do good; that ye may prosper.

Sura al-Mursalāt 77:48

وَإِذَا قِيلَ لَهُمُ ٱرْكَعُوا۟ لَا يَرْكَعُونَ

wa-idhā qīla lahumu irkaʿū lā yarkaʿūna

And when it is said to them, "Prostrate yourselves!" they do not so.