John 6:29
"Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent."
Cross References (ranked by relevance)
And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.
He that believeth on the Son hath everlasting life: and he that believeth not the Son shall not see life; but the wrath of God abideth on him.
And being made perfect, he became the author of eternal salvation unto all them that obey him;
He that believeth and is baptized shall be saved; but he that believeth not shall be damned.
Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me.
Kiss the Son, lest he be angry, and ye perish from the way, when his wrath is kindled but a little. Blessed are all they that put their trust in him.
While he yet spake, behold, a bright cloud overshadowed them: and behold a voice out of the cloud, which said, This is my beloved Son, in whom I am well pleased; hear ye him.