Al-Mu'minun Verse 2

those who humble themselves in prayer;

those who humble themselves in their prayers,

who in their prayers are humble

Those who pray humbly,

Those who in their prayer are lowly.

Those who humble themselves in their prayers;

those who, in their Prayers, humble themselves;

Who are humble in their service,

Those who humbly cry in their prayers.

—those who are humble in their prayers,

They are in their Prayer humble and fully submissive (being overwhelmed by the awe and majesty of God).

Who turn (to God) in all humility in their Prayer,

Those who in their prayers they are humble/submissive .

Those who humbly cry in their prayers.

Successful indeed are the believers (or the believers will eventually win)

Those who offer their Salat (prayers) with all solemnity and full submissiveness.

Successful indeed are the believers,

Who are humble in their prayers,

Who are humble in their prayers,

who are submissive to God in their prayers,

who are humble in their prayers;

Those who with their Salah are Khashi`un.

those who are humble in their prayer;

Those who are humble in their prayers.

those who in their prayers are humble,

Those who with their Salah are Khashi`un.

Ali bin Abi Talhah reported that Ibn Abbas said;

"(
خَاشِعُونَ
Khashi`un) means those with fear and with tranquility."

This was also narrated from Mujahid, Al-Hasan, Qatadah and Az-Zuhri.

It was reported from Ali bin Abi Talib, may Allah be pleased with him, that;
Khushu` means the Khushu` of the heart.

This was also the view of Ibrahim An-Nakha`i.

Al-Hasan Al-Basri said,

"Their Khushu` was in their hearts."

So they lowered their gaze and were humble towards others.
Khushu` in prayer is only attained by the one who has emptied his heart totally, who does not pay attention to anything else besides it, and who prefers it above all else. At that point it becomes a delight and a joy for eyes, as in the Hadith recorded by Imam Ahmad and An-Nasa'i from Anas, who said that the Messenger of Allah said;

حُبِّبَ إِلَيَّ الطِّيبُ وَالنِّسَاءُ وَجُعِلَتْ قُرَّةُ عَيْنِي فِي الصَّلَة

Fragrance and women have been made dear to me, and Salah was made the joy of my eye.

وَالَّذِينَ هُمْ عَنِ اللَّغْوِ مُعْرِضُونَ