The story of Job and his three friends. In the same
way, the Lord conditioned the intercession and prayer of Job for his three friends so that He would forgive them. Concerning this, the Holy Bible says: "...the Lord said to Eliphaz the Temanite, 'My wrath is aroused against you and your two friends, for you have not spoken of Me what is right, as My servant Job has. Now therefore, take for yourselves seven bulls and seven rams, go to My servant Job, and offer up for yourselves a burnt offering; and My servant Job shall pray for you. For I will accept him, lest I deal with you according to your folly' " (Job.42: 7,8).
In both events God Himself spoke to the erring person. However, He did not grant him forgiveness directly but conditioned the forgiveness to the prayer of the saint for the sinner so that the sinner might receive forgiveness and the saint would be venerated in the eyes of people. God not only accepts this mediation but rather asks for it.