الَّذِينَ هُمْ فِي صَلَاتِهِمْ خَاشِعُونَ
Who are humble in their service,
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 humble themselves in their prayer,
Those who in their prayer are lowly.
Those who humbly cry in their prayers.
Successful indeed are the believers (or the believers will eventually win)
Those who in their prayers they are humble/submissive .
who are humble in their Salah (prayers),
Successful indeed are the believers,
who are submissive to God in their prayers,
Who are humble in their prayers,
Those who offer their Salat (prayers) with all solemnity and full submissiveness.
Those who humble themselves in their prayers;