So your saying its implied that he asked for forgiveness, not explicit?
"So your saying its implied that he asked for forgiveness, not explicit?"
Not quite, I'm saying that he was justified by faith, like all who believe, and that part of justification is the forgiveness of sin. See Romans 4:3-8. Note that forgiveness, the covering of sin and the none imputation of sin are discussed within the context of Abraham being accounted as righteous because he believed God. The forgiveness of sin is part of the justification that happens when we believe. This is how the thief was saved and why Jesus told him he [the theif] would be with Him in paradise. This is the Gospel.