What are some Bible verses about loyalty?

Proverbs 18:24
A man of many companions may come to ruin, but there is a friend who sticks closer than a brother.

Proverbs 17:17
A friend loves at all times, and a brother is born for adversity.

Proverbs 21:21
Whoever pursues righteousness and kindness will find life, righteousness, and honor.

Ruth 1:16-17
But Ruth said, “Do not urge me to leave you or to return from following you. For where you go I will go, and where you lodge I will lodge. Your people shall be my people, and your God my God. Where you die I will die, and there will I be buried. May the Lord do so to me and more also if anything but death parts me from you.”

Titus 3:1
Remind them to be submissive to rulers and authorities, to be obedient, to be ready for every good work,

Romans 13:1
Let every person be subject to the governing authorities. For there is no authority except from God, and those that exist have been instituted by God.

John 15:13
Greater love has no one than this, that someone lay down his life for his friends.

Matthew 26:35
Peter said to him, “Even if I must die with you, I will not deny you!” And all the disciples said the same.

Proverbs 3:3
Let not steadfast love and faithfulness forsake you; bind them around your neck; write them on the tablet of your heart.

Ecclesiastes 10:4
If the anger of the ruler rises against you, do not leave your place, for calmness will lay great offenses to rest.

1 Corinthians 13:7
Love bears all things, believes all things, hopes all things, endures all things.

Matthew 26:33
Peter answered him, “Though they all fall away because of you, I will never fall away.”

1 Corinthians 16:13-14
Be watchful, stand firm in the faith, act like men, be strong. Let all that you do be done in love.

Matthew 18:15
If your brother sins against you, go and tell him his fault, between you and him alone. If he listens to you, you have gained your brother.

Deuteronomy 7:9
Know therefore that the Lord your God is God, the faithful God who keeps covenant and steadfast love with those who love him and keep his commandments, to a thousand generations,

1 Corinthians 4:2
Moreover, it is required of stewards that they be found trustworthy.

Psalm 78:8
And that they should not be like their fathers, a stubborn and rebellious generation, a generation whose heart was not steadfast, whose spirit was not faithful to God.

Proverbs 20:6
Many a man proclaims his own steadfast love, but a faithful man who can find?

Proverbs 27:17
Iron sharpens iron, and one man sharpens another.

2 Timothy 2:13
If we are faithless, he remains faithful— for he cannot deny himself.

Unless otherwise noted, all Bible verses are from The Holy Bible, English Standard Version® Copyright© 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.

Special thanks to OpenBible.info for the data on the most well-known Bible verses.