The word(s) "first" appears 63 time(s) in 59 verse(s) in Quran in Mohsin Khan translation.

(51) And those who believe in (the Oneness of) Allah and His Messengers - they are the Siddiqun (i.e. those followers of the Prophets who were first and foremost to believe in them), and the martyrs with their Lord, they shall have their reward and their light. But those who disbelieve (in the Oneness of Allah - Islamic Monotheism) and deny Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) - they shall be the dwellers of the blazing Fire.

(52) He it is Who drove out the disbelievers among the people of the Scripture (i.e. the Jews of the tribe of Banu An-Nadir) from their homes at the first gathering. You did not think that they would get out. And they thought that their fortresses would defend them from Allah! But Allah's (Torment) reached them from a place whereof they expected it not, and He cast terror into their hearts so that they destroyed their own dwellings with their own hands and the hands of the believers. Then take admonition, O you with eyes (to see).

(53) O Prophet (صلى الله عليه وسلم)! When you divorce women, divorce them at their 'Iddah (prescribed periods) and count (accurately) their 'Iddah (periods ). And fear Allah your Lord (O Muslims). And turn them not out of their (husband's) homes nor shall they (themselves) leave, except in case they are guilty of some open illegal sexual intercourse. And those are the set limits of Allah. And whosoever transgresses the set limits of Allah, then indeed he has wronged himself. You (the one who divorces his wife) know not it may be that Allah will afterward bring some new thing to pass (i.e. to return her back to you if that was the first or second divorce).

(54) Then when the Trumpet will be blown with one blowing (the first one).

(55) While He has created you in (different) stages [i.e. first Nutfah, then 'Alaqah and then Mudghah, see (V.23:13,14)].

(56) On the Day (when the first blowing of the Trumpet is blown), the earth and the mountains will shake violently (and everybody will die).

(57) So Allah, seized him with punishment for his last and first transgression. [Tafsir At-Tabari]

(58) By the ten nights (i.e. the first ten days of the month of Dhul-Hijjah) ,

(59) And truly, unto Us (belong) the last (Hereafter) and the first (this world).