The word(s) "keep" appears 94 time(s) in 90 verse(s) in Quran in Mohsin Khan translation.

(71) And We saved those who believed and used to fear Allah, keep their duty to Him and avoid evil.

(72) And they will cry: "O Malik (keeper of Hell)! Let your Lord make an end of us." He will say: "Verily, you shall abide forever."

(73) "But if you believe me not, then keep away from me and leave me alone."

(74) Those who avoid great sins (See the Qur'an, Verses: 6:152,153) and Al-Fawahish (illegal sexual intercourse) except the small faults, - verily, your Lord is of Vast Forgiveness. He knows you well when He created you from the earth (Adam), and when you were fetuses in your mothers' wombs. So ascribe not purity to yourselves. He knows best him who fears Allah and keeps his duty to Him [i.e. those who are Al-Muttaqun (the pious. See V.2:2)].

(75) Indeed We have sent Our Messengers with clear proofs, and revealed with them the Scripture and the Balance (justice) that mankind may keep up justice. And We brought forth iron wherein is mighty power (in matters of war ), as well as many benefits for mankind, that Allah may test who it is that will help Him (His religion) and His Messengers in the unseen. Verily, Allah is All-Strong, All-Mighty.

(76) O you who believe! Fear Allah and keep your duty to Him. And let every person look to what he has sent forth for the morrow, and fear Allah. Verily, Allah is All-Aware of what you do.

(77) So keep your duty to Allah and fear Him as much as you can; listen and obey, and spend in charity; that is better for yourselves. And whosoever is saved from his own covetousness, then they are the successful ones.

(78) Then when they are about to attain their term appointed, either take them back in a good manner or part with them in a good manner. And take as witness two just persons from among you (Muslims). And establish the testimony for Allah. That will be an admonition given to him who believes in Allah and the Last Day. And whosoever fears Allah and keeps his duty to Him, He will make a way for him to get out (from every difficulty).

(79) And those of your women as have passed the age of monthly courses, for them the 'Iddah (prescribed period), if you have doubt (about their periods), is three months; and for those who have no courses [(i.e. they are still immature) their 'Iddah (prescribed period) is three months likewise, except in case of death] . And for those who are pregnant (whether they are divorced or their husbands are dead), their 'Iddah (prescribed period) is until they lay down their burden; and whosoever fears Allah and keeps his duty to Him, He will make his matter easy for him.

(80) That is the Command of Allah, which He has sent down to you; and whosoever fears Allah and keeps his duty to Him, He will expiate from him his sins, and will enlarge his reward.