لاmay not كانَhave been يَومٌa day بُدِّلَتwere replaced
لا كانَ يَومٌ بُدِّلَت
فيهِon it الكَنائِسُthe churches بِالمَساجِدwith the mosques
فيهِ الكَنائِسُ بِالمَساجِد
May the day never have been
On which churches were replaced by mosques.
لاdo not تَفرَحواyou (plural) rejoice بفُتوحِكُمin your conquests
لا تَفرَحوا بفُتوحِكُم
هَذاthis فَإِنَّfor indeed الدَهرَTime راقِدasleep
هَذا فَإِنَّ الدَهرَ راقِد
Do not rejoice in your conquest—
This one—for Time lies asleep.