Verily! The torment of their Lord is that before which none can

﴿إِنَّ عَذَابَ رَبِّهِمۡ غَيۡرُ مَأۡمُونٖ ﴾
[المَعَارج: 28]

Verily! The torment of their Lord is that before which none can feel secure

﴿إن عذاب ربهم غير مأمون﴾ [المَعَارج: 28]

Al Bilal Muhammad Et Al
For their Lord’s displeasure is unlike peace and tranquility

Ali Bakhtiari Nejad
as indeed no one is safe from their Master's punishment

Ali Quli Qarai
there is indeed no security from the punishment of their Lord

Ali Unal
Indeed, their Lord’s punishment is that of which no one can ever feel secure

Hamid S Aziz
Surely the displeasure of their Lord is a thing before which none can feel secure (or is the opposite of peace and tranquillity)

John Medows Rodwell
For there is none safe from the chastisement of their Lord

Literal
That truly their Lord`s torture (is) not trusted/safe

Mir Anees Original
the punishment of their Fosterer is certainly (something from which) one should not feel secure

Mir Aneesuddin
the punishment of their Lord is certainly (something from which) one should not feel secure