And all that they had done (for security) availed them nothing.
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Tafseer
'Abdullāh Ibn 'Abbās / Muḥammad al-Fīrūzabādī
تفسير : (and that which they were wont to count as gain) their words, deeds and that which they worshipped (availed them not) against allah's torment.
Jalāl al-Dīn al-Maḥallī
تفسير : and so that which they used to count as gain, in the way of building fortresses and amassing riches, did not avail, [did not] protect, them, from the chastisement.