While most married Christian couples are aware of some specific scriptures about marriage, it’s often easy to forget that all the instructions about how to treat our brothers and sisters in Christ also apply to our relationships with our spouses. Because, if our spouse is a believer, they are not only our spouse but our brother or sister in Christ.
In the New Testament there are many scriptures by various authors as to how to treat “one another”. Here are some great articles I found with lists of these various scriptures:
https://overviewbible.com/one-another-infographic/
http://storage.cloversites.com/wakarusamissionarychurch/documents/59one_another_scriptures.pdf
https://www.mmlearn.org/hubfs/docs/OneAnotherPassages.pdf
If you want to see insights from even more authors about various “one another” scriptures, just use your preferred search engine and type in “one another in scripture” and see other resources you can find. This is just a sampling.