"And watch them, for they will soon see," meaning: for they will soon see the punishment [also, they say: wait for them].
﴿وأبصرهم فَسَوف يبصرون﴾ أَي: فَسَوف يرَوْنَ الْعَذَاب [أَيْضا يَقُولُوا: أنْتَظر بهم]
