The word(s) "disbelieved" appears 56 time(s) in 53 verse(s) in Quran in Muhammad Pickthal translation.

(41) (It is said unto them): This is (your plight) because, when Allah only was invoked, ye disbelieved, but when some partner was ascribed to Him ye were believing. But the command belongeth only to Allah, the Sublime, the Majestic.

(42) Have they not travelled in the land to see the nature of the consequence for those who disbelieved before them? They were mightier than these in power and (in the) traces (which they left behind them) in the earth. Yet Allah seized them for their sins, and they had no protector from Allah.

(43) That was because their messengers kept bringing them clear proofs (of Allah's Sovereignty) but they disbelieved; so Allah seized them. Lo! He is Strong, severe in punishment.

(44) And as for those who disbelieved (it will be said unto them): Were not Our revelations recited unto you? But ye were scornful and became a guilty folk.

(45) And on the day when those who disbelieve are exposed to the Fire (they will be asked): Is not this real? They will say: Yea, by our Lord. He will say: Then taste the doom for that ye disbelieved.

(46) These it was who disbelieved and debarred you from the Inviolable Place of Worship, and debarred the offering from reaching its goal. And if it had not been for believing men and believing women, whom ye know not - lest ye should tread them under foot and thus incur guilt for them unknowingly; that Allah might bring into His mercy whom He will - If (the believers and the disbelievers) had been clearly separated We verily had punished those of them who disbelieved with painful punishment.

(47) So this day no ransom can be taken from you nor from those who disbelieved. Your home is the Fire; that is your patron, and a hapless journey's end.

(48) He it is Who hath caused those of the People of the Scripture who disbelieved to go forth from their homes unto the first exile. Ye deemed not that they would go forth, while they deemed that their strongholds would protect them from Allah. But Allah reached them from a place whereof they recked not, and cast terror in their hearts so that they ruined their houses with their own hands and the hands of the believers. So learn a lesson, O ye who have eyes!

(49) O ye who believe! Be Allah's helpers, even as Jesus son of Mary said unto the disciples: Who are my helpers for Allah? They said: We are Allah's helpers. And a party of the Children of Israel believed, while a party disbelieved. Then We strengthened those who believed against their foe, and they became the uppermost.

(50) That is because they believed, then disbelieved, therefore their hearts are sealed so that they understand not.