For this reason I also, having heard of your faith in the Lord Jesus, and the love which you have toward all the holy ones,
For this reason - "This reason" is that they believed the "Good News". See Eph. 1:13.
- Ephesians 1:15
I also - Paul "also" prays for them. See Eph. 1:16.
having heard of your faith in the Lord Jesus - The false teachers would have instructed others not to pray for those whose faith was in Jesus, but Paul says that this is the reason that he does pray for them. Paul also confirms Jesus' lordship by using the title "Lord".
and the love which you have toward all the holy ones - False teachers taught that those who followed the Way of the Flesh should not love those who followed the Way of the Spirit. Paul commends them for loving "all" of the holy ones.