'In the Faith' in the Bible

For I long to see you so that I can provide you with some spiritual gift [See I Cor. 12:1-11], for the purpose of strengthening you [in the faith].

Now may there be glory for ever, through Jesus Christ, to the only wise God, who is able to make you stand firm [in the faith], according to the good news and proclamation of Jesus Christ. This message is the secret which was [eventually] revealed, after having been kept quiet about for long ages.