Are the sins of one who looked at what God has forbidden on Thursday then went to Friday prayer forgiven?

He who has transgressed against himself must not despair of the mercy of Allah, for Allah forgives all sins. Every son of Adam is a sinner, and the best of sinners are those who repent. And he who repents of a sin is like one who committed no sin. And Friday to Friday is an expiation for what is between them, as long as major sins are not committed.