The word(s) "disbeliever" appears 160 time(s) in 151 verse(s) in Quran in Muhammad Pickthal translation.

(11) And slay them wherever ye find them, and drive them out of the places whence they drove you out, for persecution is worse than slaughter. And fight not with them at the Inviolable Place of Worship until they first attack you there, but if they attack you (there) then slay them. Such is the reward of disbelievers.

(12) O ye who believe! spend of that wherewith We have provided you ere a day come when there will be no trafficking, nor friendship, nor intercession. The disbelievers, they are the wrong-doers.

(13) Bethink thee of him who had an argument with Abraham about his Lord, because Allah had given him the kingdom; how, when Abraham said: My Lord is He Who giveth life and causeth death, he answered: I give life and cause death. Abraham said: Lo! Allah causeth the sun to rise in the East, so do thou cause it to come up from the West. Thus was the disbeliever abashed. And Allah guideth not wrongdoing folk.

(14) Let not the believers take disbelievers for their friends in preference to believers. Whoso doeth that hath no connection with Allah unless (it be) that ye but guard yourselves against them, taking (as it were) security. Allah biddeth you beware (only) of Himself. Unto Allah is the journeying.

(15) Say: Obey Allah and the messenger. But if they turn away, lo! Allah loveth not the disbelievers (in His guidance).

(16) And they (the disbelievers) schemed, and Allah schemed (against them): and Allah is the best of schemers.

(17) O ye who believe! If ye obey a party of those who have received the Scripture they will make you disbelievers after your belief.

(18) And ward off (from yourselves) the Fire prepared for disbelievers.

(19) And that Allah may prove those who believe, and may blight the disbelievers.

(20) The forgiveness is not for those who do ill-deeds until, when death attendeth upon one of them, he saith: Lo! I repent now; nor yet for those who die while they are disbelievers. For such We have prepared a painful doom.