"For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life." ( John 3:16)

"My sheep hear my voice. I know them, and they follow me. I give them eternal life, and they will never perish. No one will snatch them out of my hand." ( John 10:27-28)

"Very truly, I tell you, whoever believes has eternal life." ( John 6:47)

"I am the resurrection and the life. Those who believe in me, even though they die, will live, and everyone who lives and believes in me will never die." ( John 11:25-26)

"And this is eternal life, that they may know you, the only true God, and Jesus Christ whom you have sent." ( John 17:3)

"Very truly, I tell you, anyone who hears my word and believes him who sent me has eternal life, and does not come under judgment, but has passed from death to life." ( John 5:24)

"This is indeed the will of my Father, that all who see the Son and believe in him may have eternal life; and I will raise them up on the last day." ( John 6:39-40)

Helpful links to related questions/topics

I am the Source of Eternal Life - Jesus Hope of Eternal Life for the Dying Claims of Jesus about Himself Believe I Am Who I Claim to Be - Jesus Life Through the Son The Sheep and the Goats Jesus Teaches Nicodemus The Rich Young Man Rewards in Heaven for Sacrifice Now Jesus the Way to the Father Why do people need to know Jesus?