2 verses have
join
in Edition Clear Qur'an by Talal Itani / Ar-Ra'd (The Thunder)

13:21And those who join what God has commanded to be joined, and fear their Lord, and dread the dire reckoning.

13:25As for those who violate the promise to God, after pledging to keep it, and sever what God has commanded to be joined, and spread corruption on earth—these, the curse will be upon them, and they will have the Worst Home.