The word(s) "believer" appears 297 time(s) in 275 verse(s) in Quran in Muhammad Habib Shakir translation.

(121) O men! there has come to you indeed an admonition from your Lord and a healing for what is in the breasts and a guidance and a mercy for the believers.

(122) And We revealed to Musa and his brother, saying: Take for your people houses to abide in Egypt and make your houses places of worship and keep up prayer and give good news to the believers.

(123) And if your Lord had pleased, surely all those who are in the earth would have believed, all of them; will you then force men till they become believers?

(124) Then We deliver Our apostles and those who believe-- even so (now), it is binding on Us (that) We deliver the believers.

(125) Say: O people! if you are in doubt as to my religion, then (know that) I do not serve those whom you serve besides Allah but I do serve Allah, Who will cause you to die, and I am commanded that I should be of the believers.

(126) Who turn away from the path of Allah and desire to make it crooked; and they are disbelievers in the hereafter.

(127) And it moved on with them amid waves like mountains; and Nuh called out to his son, and he was aloof: O my son! embark with us and be not with the unbelievers.

(128) They said: O Hud! you have not brought to us any clear argument and we are not going to desert our gods for your word, and we are not believers in you:

(129) What remains with Allah is better for you if you are believers, and I am not a keeper over you.

(130) And all we relate to you of the accounts of the apostles is to strengthen your heart therewith; and in this has come to you the truth and an admonition, and a reminder to the believers.