We are obligated to thank God for you all the time, brothers, as is fitting, because your faith is growing more and more, and your love for one another is increasing.
KJV
We are bound to thank God always 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;
ASV
We are bound to give thanks to God always to you, brethren, even as it is meet, for that your faith growth exceedingly, and the love of each one of you all toward one another aboundeth;