'True God' in the Bible

and many days are to Israel without a true God, and without a teaching priest, and without law,

and this is the life age-during, that they may know Thee, the only true God, and him whom Thou didst send -- Jesus Christ;

for they themselves concerning us do declare what entrance we had unto you, and how ye did turn unto God from the idols, to serve a living and true God,

and we have known that the Son of God is come, and hath given us a mind, that we may know Him who is true, and we are in Him who is true, in His Son Jesus Christ; this one is the true God and the life age-during!