The gift of God through Jesus Christ.
Whoever believes in the Son has everlasting life.
What the Scriptures say
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. John 3:16 · KJV
And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand. John 10:28 · KJV
And this is the record, that God hath given to us eternal life, and this life is in his Son. He that hath the Son hath life; and he that hath not the Son of God hath not life. 1 John 5:11-12 · KJV