The Quran root ص ل و ṣ-l-w

الَّذِينَ يُؤْمِنُونَ بِالْغَيْبِ وَيُقِيمُونَ الصَّلَاةَ وَمِمَّا رَزَقْنَاهُمْ يُنفِقُونَ ٣

الصَّلَاةَ l-ṣalata · the prayer

Who believe in the unseen, establish prayer, and spend out of what We have provided for them, (Surah Al-Baqarah, 2:3)

وَأَقِيمُوا الصَّلَاةَ وَآتُوا الزَّكَاةَ وَارْكَعُوا مَعَ الرَّاكِعِينَ ٤٣

الصَّلَاةَ l-ṣalata · the prayer

And establish prayer and give zakāh and bow with those who bow [in worship and obedience]. (Surah Al-Baqarah, 2:43)

فَنَادَتْهُ الْمَلَائِكَةُ وَهُوَ قَائِمٌ يُصَلِّي فِي الْمِحْرَابِ أَنَّ اللَّهَ يُبَشِّرُكَ بِيَحْيَىٰ مُصَدِّقًا بِكَلِمَةٍ مِّنَ اللَّهِ وَسَيِّدًا وَحَصُورًا وَنَبِيًّا مِّنَ الصَّالِحِينَ ٣٩

يُصَلِّي yuṣallī · praying

So the angels called him while he was standing in prayer in the chamber, "Indeed, Allāh gives you good tidings of John, confirming a word from Allāh and [who will be] honorable, abstaining [from women], and a prophet from among the righteous." (Surah Ali 'Imran, 3:39)

إِلَّا الْمُصَلِّينَ ٢٢

الْمُصَلِّينَ l-muṣalīna · those who pray

Except the observers of prayer - (Surah Al-Ma'arij, 70:22)

وَإِذْ جَعَلْنَا الْبَيْتَ مَثَابَةً لِّلنَّاسِ وَأَمْنًا وَاتَّخِذُوا مِن مَّقَامِ إِبْرَاهِيمَ مُصَلًّى وَعَهِدْنَا إِلَىٰ إِبْرَاهِيمَ وَإِسْمَاعِيلَ أَن طَهِّرَا بَيْتِيَ لِلطَّائِفِينَ وَالْعَاكِفِينَ وَالرُّكَّعِ السُّجُودِ ١٢٥

مُصَلًّى muṣallan · (as) a place of prayer

And [mention] when We made the House [i.e., the Kaʿbah] a place of return for the people and [a place of] security. And take, [O believers], from the standing place of Abraham a place of prayer. And We charged Abraham and Ishmael, [saying], "Purify My House for those who perform ṭawāf and those who are staying [there] for worship and those who bow and prostrate [in prayer]." (Surah Al-Baqarah, 2:125)