The word(s) "believer" appears 350 time(s) in 314 verse(s) in Quran in Muhammad Pickthal translation.

(101) And if they would deceive thee, then lo! Allah is Sufficient for thee. He it is Who supporteth thee with His help and with the believers,

(102) And (as for the believers) hath attuned their hearts. If thou hadst spent all that is in the earth thou couldst not have attuned their hearts, but Allah hath attuned them. Lo! He is Mighty, Wise.

(103) O Prophet! Allah is Sufficient for thee and those who follow thee of the believers.

(104) O Prophet! Exhort the believers to fight. If there be of you twenty steadfast they shall overcome two hundred, and if there be of you a hundred (steadfast) they shall overcome a thousand of those who disbelieve, because they (the disbelievers) are a folk without intelligence.

(105) Those who believed and left their homes and strove for the cause of Allah, and those who took them in and helped them - these are the believers in truth. For them is pardon, and bountiful provision.

(106) Travel freely in the land four months, and know that ye cannot escape Allah and that Allah will confound the disbelievers (in His Guidance).

(107) And they observe toward a believer neither pact nor honour. These are they who are transgressors.

(108) Will ye not fight a folk who broke their solemn pledges, and purposed to drive out the messenger and did attack you first? What! Fear ye them? Now Allah hath more right that ye should fear Him, if ye are believers

(109) Fight them! Allah will chastise them at your hands, and He will lay them low and give you victory over them, and He will heal the breasts of folk who are believers.

(110) Or deemed ye that ye would be left (in peace) when Allah yet knoweth not those of you who strive, choosing for familiar none save Allah and His messenger and the believers? Allah is Informed of what ye do.