“Forgive us. As WE forgive those who trespass against US.” It’s all right there in the Bible. In fact, we’re supposed to forgive 770 times. I’ve never had anyone do something to me 770 times so I don’t know what the commandment is if it hits 771.
It’s 7 times 70 if I remember correctly, which according to my calculations is 490. But to be fair, there is a certain context to it. Forgiveness does not mean allowing someone to sin or do you wrong, it just means don’t repay in like kind. If we’re only nice to those who are nice to us, and cruel to those cruel to us, what good is it? That’s what everyone does, and requires no effort. It’s the unexpected that can have profound consequences.