The word(s) "believe" appears 1141 time(s) in 920 verse(s) in Quran in Muhammad Pickthal translation.

(801) O ye who believe! Shun much suspicion; for lo! some suspicion is a crime. And spy not, neither backbite one another. Would one of you love to eat the flesh of his dead brother? Ye abhor that (so abhor the other)! And keep your duty (to Allah). Lo! Allah is Relenting, Merciful.

(802) The wandering Arabs say: We believe. Say (unto them, O Muhammad): Ye believe not, but rather say "We submit," for the faith hath not yet entered into your hearts. Yet, if ye obey Allah and His messenger, He will not withhold from you aught of (the reward of) your deeds. Lo! Allah is Forgiving, Merciful.

(803) The (true) believers are those only who believe in Allah and His messenger and afterward doubt not, but strive with their wealth and their lives for the cause of Allah. Such are the sincere.

(804) Nay, but they marvel that a warner of their own hath come unto them; and the disbelievers say: This is a strange thing:

(805) Then we brought forth such believers as were there.

(806) And warn, for warning profiteth believers.

(807) And woe unto those who disbelieve, from (that) their day which they are promised.

(808) And they who believe and whose seed follow them in faith, We cause their seed to join them (there), and We deprive them of nought of their (life's) work. Every man is a pledge for that which he hath earned.

(809) Or say they: He hath invented it? Nay, but they will not believe!

(810) Or seek they to ensnare (the messenger)? But those who disbelieve, they are the ensnared!