If a reborn Christian committed sin when he/she was weak, do you think she/he will be punished

If a reborn Christian committed sin when he/she was weak, do you think she/he will be punished.

Law- sin and punishment
Gospel- sin and forgiveness

but he must Believe that.

Mark 3:28-30:
"Truly I tell you, all sins and blasphemes will be forgiven for the sons of men. But whoever blasphemes against the Holy Spirit will never be forgiven, but is guilty of an eternal sin.

New believer or matured b believer if really have the repentant heart God will forgive, God is so rich i Mercy.

If they repent sincerely and cleanse their sins by Jesus blood, they will not be punished.