Surah Al-Mu'minun 23:2
ٱلَّذِينَ هُمْ فِى صَلَاتِهِمْ خَـٰشِعُونَ
They who are during their prayer humbly intent
Translation: Saheeh International
Tafsir
those who in their prayers are humble
Excerpt from Tafsir al-Jalalayn, commentary on 23:2, via Quran.com. The reader has the full commentary and 9 more tafsirs.