The word(s) "worst" appears 33 time(s) in 33 verse(s) in Quran in Mohsin Khan translation.

(1) And (remember) when We took your covenant and We raised above you the Mount (saying), "Hold firmly to what We have given you and hear (Our Word)." They said, "We have heard and disobeyed." And their hearts absorbed (the worship of) the calf because of their disbelief. Say: "worst indeed is that which your faith enjoins on you if you are believers."

(2) And (remember) when Ibrahim (Abraham) said, "My Lord, make this city (Makkah) a place of security and provide its people with fruits, such of them as believe in Allah and the Last Day." He (Allah) answered: "As for him who disbelieves, I shall leave him in contentment for a while, then I shall compel him to the torment of the Fire, and worst indeed is that destination!"

(3) And when it is said to him, "Fear Allah", he is led by arrogance to (more) crime. So enough for him is Hell, and worst indeed is that place to rest!

(4) Say (O Muhammad صلى الله عليه وسلم) to those who disbelieve: "You will be defeated and gathered together to Hell, and worst indeed is that place to rest."

(5) Is then one who follows (seeks) the good Pleasure of Allah (by not taking illegally a part of the booty) like the one who draws on himself the Wrath of Allah (by taking a part of the booty illegally - Ghulul)? - his abode is Hell, and worst, indeed is that destination!

(6) (And remember) when Allah took a covenant from those who were given the Scripture (Jews and Christians) to make it (the news of the coming of Prophet Muhammad صلى الله عليه وسلم and the religious knowledge) known and clear to mankind, and not to hide it, but they threw it away behind their backs, and purchased with it some miserable gain! And indeed worst is that which they bought.

(7) A brief enjoyment; then, their ultimate abode is Hell; and worst indeed is that place for rest.

(8) And (remember) Lut (Lot), when he said to his people: "Do you commit the worst sin such as none preceding you has committed in the 'Alamin (mankind and jinn)?

(9) And (remember) when We rescued you from Fir'aun's (Pharaoh) people, who were afflicting you with the worst torment, killing your sons and letting your women live. And in that was a great trial from your Lord.

(10) And whoever turns his back to them on such a day - unless it be a stratagem of war, or to retreat to a troop (of his own), - he indeed has drawn upon himself wrath from Allah. And his abode is Hell, and worst indeed is that destination!