I Thessalonians 3:7-10

therefore, brethren, in all our affliction and distress we were comforted concerning you by your faith. For now we live, if you stand fast in the Lord. For what thanks can we render to God for you, for all the joy with which we rejoice for your sake before our God, night and day praying exceedingly that we may see your face and perfect what is lacking in your faith?