The word(s) "4" appears 21 time(s) in 16 verse(s) in Quran in Mohsin Khan translation.

(1) How can you disbelieve in Allah? seeing that you were dead and He gave you life. Then He will give you death, then again will bring you to life (on the Day of Resurrection) and then unto Him you will return (See V.40:11)

(2) O you who believe! Say not (to the Messenger صلى الله عليه وسلم) Ra'ina but say Unzurna (make us understand) and hear. And for the disbelievers there is a painful torment. (See Verse 4:46)

(3) There has already been a sign for you (O Jews) in the two armies that met (in combat i.e. the battle of Badr). One was fighting in the Cause of Allah, and as for the other, (they) were disbelievers. They (the believers) saw them (the disbelievers) with their own eyes twice their number (although they were thrice their number). And Allah supports with His Victory whom He wills. Verily, in this is a lesson for those who understand. (See Verse 8:44). (Tafsir At-Tabari)

(4) So Allah gave them the reward of this world, and the excellent reward of the Hereafter. And Allah loves Al-Muhsinun (the good-doers - See the footnote of V.3:134 and of V.9:120).

(5) And He is Allah (to be worshipped Alone) in the heavens and on the earth; He knows what you conceal and what you reveal, and He knows what you earn (good or bad). (See V.43:84)

(6) Those who fear Allah, keep their duty to Him and avoid evil are not responsible for them (the disbelievers) in any case, but (their duty) is to remind them, that they may fear Allah (and refrain from mocking at the Qur'an). [The provision of this Verse was abrogated by the Verse 4:140].

(7) And ask them (O Muhammad صلى الله عليه وسلم) about the town that was by the sea; when they transgressed in the matter of the Sabbath (i.e. Saturday): when their fish came to them openly on the Sabbath day, and did not come to them on the day they had no Sabbath. Thus We made a trial of them, for they used to rebel against Allah's Command (disobey Allah) [see the Qur'an: V.4:154 and its footnote].

(8) Fight against those who (1) believe not in Allah, (2) nor in the Last Day, (3) nor forbid that which has been forbidden by Allah and His Messenger Muhammad (صلى الله عليه وسلم) (4) and those who acknowledge not the religion of truth (i.e. Islam) among the people of the Scripture (Jews and Christians), until they pay the Jizyah with willing submission, and feel themselves subdued.

(9) The description of the Paradise which the Muttaqun (the pious - See V.2:2) have been promised: Underneath it rivers flow, its provision is eternal and so is its shade; this is the end (final destination) of the Muttaqun (the pious - See V.2:2), and the end (final destination) of the disbelievers is Fire. (See Verse 47:15)

(10) And unto those who are Jews, We have forbidden such things as We have mentioned to you (O Muhammad صلى الله عليه و سلم) before [see Verse 6:146]. And We wronged them not, but they used to wrong themselves.