I don't know if what God is describing is a tattoo, but look at what he says through Isaiah:
"Can a mother forget the baby at her breast and have no compassion on the child she has borne? Though she may forget, I will not forget you! See, I have engraved you on the palms of my hands...
Isaiah 49:15-16
Is an engraving in the hand a tattoo? I'll let you decide.
But here's the greater point - God will never forget about you. No matter how low in life you are, how terrible you feel, how beaten up Satan has you, God says "I will not forget you!"
Next time you feel lonely, unloved, forgotten, or despised, REMEMBER that God has your name engraved on the palm of His hand.

