The word(s) "join" appears 44 time(s) in 42 verse(s) in Quran in Saheeh International translation.

(1) Who break the covenant of Allah after contracting it and sever that which Allah has ordered to be joined and cause corruption on earth. It is those who are the losers.

(2) And [recall] when We took the covenant from the Children of Israel, [enjoining upon them], "Do not worship except Allah; and to parents do good and to relatives, orphans, and the needy. And speak to people good [words] and establish prayer and give zakah." Then you turned away, except a few of you, and you were refusing.

(3) And [recall] when We took your covenant and raised over you the mount, [saying], "Take what We have given you with determination and listen." They said [instead], "We hear and disobey." And their hearts absorbed [the worship of] the calf because of their disbelief. Say, "How wretched is that which your faith enjoins upon you, if you should be believers."

(4) Fighting has been enjoined upon you while it is hateful to you. But perhaps you hate a thing and it is good for you; and perhaps you love a thing and it is bad for you. And Allah Knows, while you know not.

(5) And let there be [arising] from you a nation inviting to [all that is] good, enjoining what is right and forbidding what is wrong, and those will be the successful.

(6) You are the best nation produced [as an example] for mankind. You enjoin what is right and forbid what is wrong and believe in Allah. If only the People of the Scripture had believed, it would have been better for them. Among them are believers, but most of them are defiantly disobedient.

(7) They believe in Allah and the Last Day, and they enjoin what is right and forbid what is wrong and hasten to good deeds. And those are among the righteous.

(8) Rejoicing in what Allah has bestowed upon them of His bounty, and they receive good tidings about those [to be martyred] after them who have not yet joined them - that there will be no fear concerning them, nor will they grieve.

(9) Who are stingy and enjoin upon [other] people stinginess and conceal what Allah has given them of His bounty - and We have prepared for the disbelievers a humiliating punishment -

(10) So fight, [O Muhammad], in the cause of Allah; you are not held responsible except for yourself. And encourage the believers [to join you] that perhaps Allah will restrain the [military] might of those who disbelieve. And Allah is greater in might and stronger in [exemplary] punishment.