even if they witness every single sign that might come to them

﴿وَلَوۡ جَآءَتۡهُمۡ كُلُّ ءَايَةٍ حَتَّىٰ يَرَوُاْ ٱلۡعَذَابَ ٱلۡأَلِيمَ ﴾
[يُونس: 97]

even if they witness every single sign that might come to them until they are face to face with the painful chastisement

﴿ولو جاءتهم كل آية حتى يروا العذاب الأليم﴾ [يُونس: 97]

Abdel Haleem
even if every sign comes to them, until they see the agonizing torment

Abdul Hye
even if every Verse should come to them, until they see the painful punishment

Abdullah Yusuf Ali
Even if every Sign was brought unto them,- until they see (for themselves) the penalty grievous

Abdul Majid Daryabadi
Even though every sign should come unto them, until they hehold an afflictive torment

Ahmed Ali
Even though all the signs came to them, not till they face the grievous punishment

Aisha Bewley
not even if every Sign were to come to them — until they see the painful punishment

A. J. Arberry
though every sign come to them, till they see the painful chastisement

Ali Quli Qarai
even though every sign were to come to them, until they sight the painful punishment