Growth in Grace:

2 Thessalonians 1:3
We are bound to always thank God for you, brethren, as it is meet, because that your faith groweth exceedingly, and the charity of every one of you all toward each other aboundeth.

Brotherly Love:

1 Thessalonians 4:9
But as touching brotherly love ye need not that i write unto you; for ye yourselves are taught of God to love one another.

1 John 2:10
He that loveth his brother abideth in the light, and there is none occasion of stumbling in him.

1 John 3:18
My little children, let us not love in word, neither in tongue; but in deed and truth.