Then We know very well those who are worthiest to be roasted in the Fire.
We know full well those who are most deserving of burning therein.
We alone know who deserves most to be burned therein
Again, We certainly know best those who deserve most to be burned therein
Then We are (E) more knowledgeable with (about) those who, they are more worthy/deserving roasting/suffering/burning with (in) it (Hell)
I know exactly who deserves to be burnt in the Hell
Moreover, We well know those who most deserve to be burned in hell
And surely, WE know best those deserving to be burnt therein
And We know best those who are most deserving of being thrown into Hell
Behold! We surely know best those who are the most deserving of being cast and burnt therein (- the Hell)
Then, verily, We know best those who are most worthy of being burnt therein