Allah the Almighty promises Paradise to His servants who fear Him in secret or in public. It is said in the Qur’an:
And as for him who fears to stand in the presence of his Lord and forbids the soul from low desires, then surely the Garden – that is the abode. (Nazi`at, 79/40-41).
This is what you were promised: (it is) for everyone who turns frequently (to Allah]) and keeps (His limits), who fears the Beneficent Allah in secret and comes with a penitent heart. (Qaf, 50/32-33).
Their sides draw away from (their) beds; they call upon their Lord in fear and in hope, and they spend (benevolently) out of what We have given them. (Sajdah, 32/16).
The nights of the Messengers and Friends of Allah, which they spend in fear of Allah and in hope of His beneficence, are brighter than the day, for their nights are filled with the serenity and spirituality of their prostration in tears.