The word(s) "strive" appears 34 time(s) in 29 verse(s) in Quran in Mohsin Khan translation.

(21) But those who strive against Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) to frustrate them - those, for them will be a severe painful torment.

(22) And those who strive against Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), to frustrate them, they will be brought to the torment.

(23) And surely, We shall try you till We test those who strive hard (for the Cause of Allah) and As-Sabirun (the patient), and We shall test your facts (i.e. the one who is a liar, and the one who is truthful).

(24) Only those are the believers who have believed in Allah and His Messenger, and afterward doubt not but strive with their wealth and their lives for the Cause of Allah. Those! They are the truthful.

(25) O you who believe! Take not My enemies and your enemies (i.e. disbelievers and polytheists) as friends, showing affection towards them, while they have disbelieved in what has come to you of the truth (i.e. Islamic Monotheism, this Qur'an, and Muhammad صلى الله عليه وسلم), and have driven out the Messenger (Muhammad صلى الله عليه وسلم) and yourselves (from your homeland) because you believe in Allah your Lord! If you have come forth to strive in My Cause and to seek My Good Pleasure, (then take not these disbelievers and polytheists as your friends). You show friendship to them in secret, while I am All-Aware of what you conceal and what you reveal. And whosoever of you (Muslims) does that, then indeed he has gone (far) astray from the Straight Path .

(26) That you believe in Allah and His Messenger (Muhammad صلى الله عليه وسلم) and that you strive hard and fight in the Cause of Allah with your wealth and your lives: that will be better for you, if you but know!

(27) O you who believe! Be you helpers (in the Cause) of Allah as said 'Îsa (Jesus), son of Maryam (Mary), to the Hawariyyun (the disciples): "Who are my helpers (in the Cause) of Allah?" The Hawariyyun (the disciples) said: "We are Allah's helpers" (i.e. we will strive in His Cause!). Then a group of the Children of Israel believed and a group disbelieved. So We gave power to those who believed against their enemies, and they became the victorious (uppermost).

(28) O Prophet (Muhammad صلى الله عليه وسلم)! strive hard against the disbelievers and the hypocrites, and be severe against them; their abode will be Hell, and worst indeed is that destination.

(29) The last thereof (that wine) will be the smell of Musk, and for this let (all) those strive who want to strive (i.e. hasten earnestly to the obedience of Allah).