The word(s) "fall" appears 74 time(s) in 72 verse(s) in Quran in Mohsin Khan translation.

(41) Make not the calling of the Messenger (Muhammad صلى الله عليه وسلم) among you as your calling one of another. Allah knows those of you who slip away under shelter (of some excuse without taking the permission to leave, from the Messenger (صلى الله عليه وسلم). And let those who oppose the Messenger's (Muhammad صلى الله عليه وسلم) commandment (i.e. his Sunnah - legal ways, orders, acts of worship, statements) (among the sects) beware, lest some Fitnah (disbelief, trials, afflictions, earthquakes, killing, overpowered by a tyrant) should befall them or a painful torment be inflicted on them.

(42) And when it is said to them: "Prostrate yourselves to the Most Gracious (Allah)! they say: "And what is the Most Gracious? Shall we fall down in prostration to that which you (O Muhammad صلى الله عليه وسلم) command us?" And it increases in them only aversion.

(43) And those who, when they are reminded of the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of their Lord, fall not deaf and blind thereat.

(44) "So cause a piece of the heaven to fall on us, if you are of the truthful!"

(45) And your movements among those who fall prostrate (to Allah in the five compulsory congregational prayers).

(46) Allah is He Who sends the winds, so that they raise clouds, and spread them along the sky as He wills, and then break them into fragments, until you see rain drops come forth from their midst! Then when He has made them fall on whom of His slaves as He wills, lo, they rejoice!

(47) "O my son! Aqim-As-Salat (perform As-Salat), enjoin (on people) Al-Ma'ruf - (Islamic Monotheism and all that is good), and forbid (people) from Al-Munkar (i.e. disbelief in the Oneness of Allah, polytheism of all kinds and all that is evil and bad), and bear with patience whatever befalls you. Verily, these are some of the important commandments (ordered by Allah with no exemption).

(48) Only those believe in Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), who, when they are reminded of them, fall down prostrate, and glorify the Praises of their Lord, and they are not proud.

(49) See they not what is before them and what is behind them, of the heaven and the earth? If We will, We shall sink the earth with them, or cause a piece of the heaven to fall upon them. Verily, in this is a sign for every slave who turns to Allah in repentance (i.e. the one who believes in the Oneness of Allah and performs deeds of His obedience and always begs His Pardon).

(50) So when I have fashioned him and breathed into him (his) soul created by Me, then you fall down prostrate to him."