GOD IN THE OLD TESTAMENT:

 "I AM WHO I AM. This is what you are to say to the Israelites: 'I AM has sent me to you.'"(Exodus 3:14)

GOD IN THE NEW TESTAMENT:

Jesus stated:

“Before Abraham was, “I AM” (John 8:58)

OTHER NT SCRIPTURES WHERE JESUS SAYS “I AM”:
“I AM the Way, Truth and Life” (John 14:6)
“I AM the Bread of Life” (Johh 6:35)
“I AM the Light of the world” (John 8:12)
“I AM the gate” (John 10:9)
“I AM the Good Shepherd” (John 10:11)
“I AM the Resurrection & Life” (John 11:25)
“I AM the Vine” (John 15:5)

Brief bible study…

Q: Why does God call Himself “I AM”?
A: Because He ALWAYS WAS, ALWAYS IS and ALWAYS WILL BE. He doesn’t change.(Hebrews 13:8)