The genitive 's refers to what belongs to you. I say Jack's car. I mean the car belongs to Jack. I could also say, 'his car' using possessive adjective. My question is about 'God's forgiveness'. It is God who forgives, so it should be 'man's forgiveness' because 'forgiveness is to man' and it was 'from' God. Why is the phrase 'God's forgiveness' grammatical, I have a confusion.
to pray for God’s forgiveness
https://www.oxfordlearnersdictionaries.com/definition/english/forgiveness?q=forgiveness