“One another” is two words in English, but it’s only one word in Greek: ἀλλήλων (ah-LAY-loan). It’s used 100 times in 94 New Testament verses. 47 of those verses give instructions to the church, and 60% of those instructions come from Paul.

Unity

One third of the one-another commands deal with the unity of the church.

1. Be at peace with one another (Mk 9:50)
2. Don’t grumble among one another (Jn 6:43)
3. Be of the same mind with one another (Ro 12:16, 15:5)
4. Accept one another (Ro 15:7)
5. Wait for one another before beginning the Eucharist (1 Co 11:33)
6. Don’t bite, devour, and consume one another—seriously, guys, don’t eat each other (Ga 5:15)
7. Don’t boastfully challenge or envy one another (Ga 5:26).
8. Gently, patiently tolerate one another (Ep 4:2)
9. Be kind, tender-hearted, and forgiving to one another (Ep 4:32)
10. Bear with and forgive one another (Co 3:13)
11. Seek good for one another, and don’t repay evil for evil (1 Th 5:15)
12. Don’t complain against one another (Jas 4:11, 5:9)
13. Confess sins to one another (Jas 5:16)

Love

One third of them instruct Christians to love one another.

1. Love one another (Jn 13:34, 15:12, 17; Ro 13:8; 1 Th 3:12, 4:9; 1 Pe 1:22; 1 Jn 3:11, 4:7, 11; 2 Jn 5)
2. Through love, serve one another (Ga 5:13)
3. Tolerate one another in love (Ep 4:2)
4. Greet one another with a kiss of love (1 Pe 5:14)
5. Be devoted to one another in love (Ro 12:10)

Humility

About 15% stress an attitude of humility and deference among believers.

1. Give preference to one another in honor (Ro 12:10)
2. Regard one another as more important than yourselves (Php 2:3)
3. Serve one another (Ga 5:13)
4. Wash one another’s feet (Jn 13:14)
5. Don’t be haughty: be of the same mind (Ro 12:16)
6. Be subject to one another (Ep 5:21)
7. Clothe yourselves in humility toward one another (1 Pe 5:5)

Here’s the rest:

1. Do not judge one another, and don’t put a stumbling block in a brother’s way (Ro 14:13)
2. Greet one another with a kiss (Ro 16:16; 1 Co 16:20; 2 Co 13:12)
3. Husbands and wives: don’t deprive one another of physical intimacy (1 Co 7:5)
4. Bear one another’s burdens (Ga 6:2)
5. Speak truth to one another (Ep 4:25)
6. Don’t lie to one another (Co 3:9)
7. Comfort one another concerning the resurrection (1 Th 4:18)
8. Encourage and build up one another (1 Th 5:11)
9. Stimulate one another to love and good deeds (He 10:24)
10. Pray for one another (Jas 5:16)
11. Be hospitable to one another (1 Pe 4:9)
    

Of course, Jesus and the apostles give many more instructions to the church; these “one another” passages are a good start, though.

Also: make sure you read these in context! These commands come from Jesus, Peter, John, Paul, and James, and
they’re scattered across the New Testament. Don’t just stop at this list: dig into these passages to see what the author was talking about.