Verses with the word acknowledging in the New Testament (3 verses):

2 Timothy 2:25
In meekness instructing those that oppose themselves; if God peradventure will give them repentance to the acknowledging of the truth;

Titus 1:1
Paul, a servant of God, and an apostle of Jesus Christ, according to the faith of God's elect, and the acknowledging of the truth which is after godliness;

Philemon 1:6
That the communication of thy faith may become effectual by the acknowledging of every good thing which is in you in Christ Jesus.