The word(s) "bad" appears 59 time(s) in 49 verse(s) in Quran in Mohsin Khan translation.

(1) And who believe in (the Qur'an and the Sunnah ) which has been sent down (revealed) to you (O Muhammad صلى الله عليه وسلم) and in that which was sent down before you [the Taurat (Torah) and the Injeel (Gospel), etc.] and they believe with certainty in the Hereafter. (Resurrection, recompense of their good and bad deeds, Paradise and Hell).

(2) How bad is that for which they have sold their ownselves, that they should disbelieve in that which Allah has revealed (the Qur'an), grudging that Allah should reveal of His Grace unto whom He wills of His slaves. So they have drawn on themselves wrath upon wrath. And for the disbelievers, there is disgracing torment.

(3) They followed what the Shayatin (devils) gave out (falsely of the magic) in the lifetime of Sulaiman (Solomon). Sulaiman did not disbelieve, but the Shayatin (devils) disbelieved, teaching men magic and such things that came down at Babylon to the two angels, Harut and Marut, but neither of these two (angels) taught anyone (such things) till they had said, "We are only for trial, so disbelieve not (by learning this magic from us)." And from these (angels) people learn that by which they cause separation between man and his wife, but they could not thus harm anyone except by Allah's Leave. And they learn that which harms them and profits them not. And indeed they knew that the buyers of it (magic) would have no share in the Hereafter. And how bad indeed was that for which they sold their ownselves, if they but knew.

(4) Jihad (holy fighting in Allah's cause) is ordained for you (Muslims) though you dislike it, and it may be that you dislike a thing which is good for you and that you like a thing which is bad for you. Allah knows but you do not know.

(5) O you who believe! Spend of the good things which you have (legally) earned, and of that which We have produced from the earth for you, and do not aim at that which is bad to spend from it, (though) you would not accept it save if you close your eyes and tolerate therein. And know that Allah is Rich (Free of all needs), and Worthy of all praise.

(6) There has already been a sign for you (O Jews) in the two armies that met (in combat i.e. the battle of badr). One was fighting in the Cause of Allah, and as for the other, (they) were disbelievers. They (the believers) saw them (the disbelievers) with their own eyes twice their number (although they were thrice their number). And Allah supports with His Victory whom He wills. Verily, in this is a lesson for those who understand. (See Verse 8:44). (Tafsir At-Tabari)

(7) And Allah has already made you victorious at badr, when you were a weak little force. So fear Allah much that you may be grateful.

(8) And give unto orphans their property and do not exchange (your) bad things for (their) good ones; and devour not their substance (by adding it) to your substance. Surely, this is a great sin.

(9) Say (O Muhammad صلى الله عليه وسلم): "Not equal are Al-Khabith (all that is evil and bad as regards things, deeds, beliefs, persons and foods) and At-Taiyyib (all that is good as regards things, deeds, beliefs, persons, foods), even though the abundance of Al-Khabith may please you." So fear Allah , O men of understanding in order that you may be successful.

(10) And He is Allah (to be worshipped Alone) in the heavens and on the earth; He knows what you conceal and what you reveal, and He knows what you earn (good or bad). (See V.43:84)