The word(s) "reason" appears 45 time(s) in 45 verse(s) in Quran in Saheeh International translation.

(1) Do you order righteousness of the people and forget yourselves while you recite the Scripture? Then will you not reason?

(2) So, We said, "Strike the slain man with part of it." Thus does Allah bring the dead to life, and He shows you His signs that you might reason.

(3) And when they meet those who believe, they say, "We have believed"; but when they are alone with one another, they say, "Do you talk to them about what Allah has revealed to you so they can argue with you about it before your Lord?" Then will you not reason?

(4) Indeed, in the creation of the heavens and earth, and the alternation of the night and the day, and the [great] ships which sail through the sea with that which benefits people, and what Allah has sent down from the heavens of rain, giving life thereby to the earth after its lifelessness and dispersing therein every [kind of] moving creature, and [His] directing of the winds and the clouds controlled between the heaven and the earth are signs for a people who use reason.

(5) Divorced women remain in waiting for three periods, and it is not lawful for them to conceal what Allah has created in their wombs if they believe in Allah and the Last Day. And their husbands have more right to take them back in this [period] if they want reconciliation. And due to the wives is similar to what is expected of them, according to what is reasonable. But the men have a degree over them [in responsibility and authority]. And Allah is Exalted in Might and Wise.

(6) Thus does Allah make clear to you His verses that you might use reason.

(7) O People of the Scripture, why do you argue about Abraham while the Torah and the Gospel were not revealed until after him? Then will you not reason?

(8) O you who have believed, do not take as intimates those other than yourselves, for they will not spare you [any] ruin. They wish you would have hardship. Hatred has already appeared from their mouths, and what their breasts conceal is greater. We have certainly made clear to you the signs, if you will use reason.

(9) And when you call to prayer, they take it in ridicule and amusement. That is because they are a people who do not use reason.

(10) Allah has not appointed [such innovations as] bahirah or sa'ibah or wasilah or ham. But those who disbelieve invent falsehood about Allah, and most of them do not reason.