The word(s) "believed" appears 189 time(s) in 171 verse(s) in Quran in Mohsin Khan translation.

(31) Indeed Allah took the covenant from the Children of Israel (Jews), and We appointed twelve leaders among them. And Allah said: "I am with you if you perform As-Salat (Iqamat-as-Salat ) and give Zakat and believe in My Messengers; honour and assist them, and lend a good loan to Allah, verily, I will expiate your sins and admit you to Gardens under which rivers flow (in Paradise). But if any of you after this, disbelieved, he has indeed gone astray from the Straight Path."

(32) And whosoever takes Allah, His Messenger, and those who have believed, as Protectors, then the party of Allah will be the victorious.

(33) And if only the people of the Scripture (Jews and Christians) had believed (in Muhammad صلى الله عليه وسلم) and warded off evil (sin, ascribing partners to Allah) and had become Al-Muttaqun (the pious - See V.2:2) We would indeed have expiated from them their sins and admitted them to Gardens of pleasure (in Paradise).

(34) Surely, those who believe (in the Oneness of Allah, in His Messenger Muhammad صلى الله عليه وسلم and all that was revealed to him from Allah), and those who are the Jews and the Sabians and the Christians, - whosoever believed in Allah and the Last Day, and worked righteousness, on them shall be no fear, nor shall they grieve.

(35) Surely, they have disbelieved who say: "Allah is the Messiah ['Îsa (Jesus)], son of Maryam (Mary)." But the Messiah ['Îsa (Jesus)] said: "O Children of Israel! Worship Allah, my Lord and your Lord." Verily, whosoever sets up partners (in worship) with Allah, then Allah has forbidden Paradise to him, and the Fire will be his abode . And for the Zalimun (polytheists and wrong-doers) there are no helpers.

(36) The Messiah ['Îsa (Jesus)], son of Maryam (Mary), was no more than a Messenger; many were the Messengers that passed away before him. His mother [Maryam (Mary)] was a Siddiqah [i.e. she believed in the Words of Allah and His Books (see Verse 66:12)]. They both used to eat food (as any other human being, while Allah does not eat). Look how We make the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) clear to them; yet look how they are deluded away (from the truth).

(37) Those among the Children of Israel who disbelieved were cursed by the tongue of Dawud (David) and 'Îsa (Jesus), son of Maryam (Mary). That was because they disobeyed (Allah and the Messengers) and were ever transgressing beyond bounds.

(38) And had they believed in Allah, and in the Prophet (Muhammad صلى الله عليه وسلم) and in what has been revealed to him, never would they have taken them (the disbelievers) as Auliya' (protectors and helpers); but many of them are the Fasiqun (rebellious, disobedient to Allah).

(39) But those who disbelieved and belied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), they shall be the dwellers of the (Hell) Fire.

(40) And even if We had sent down unto them angels, and the dead had spoken unto them, and We had gathered together all things before their very eyes, they would not have believed, unless Allah willed, but most of them behave ignorantly.