Pastor Peter realized that there is additional money that has been deposited in his bank account. But he could not know where they came from. And hence he had to go to the bank to confirm if it was not deposited by mistake.
Upon going to the bank; he was told the money has come from the mobile number. On being shown the number that sent the money he realized it is his own number. And was told by the service provider at the bank that if he has to resend the money back to the sender then the money would have to go to the mobile number shown and also if the money was sent by mistake then the sender who is the owner of that phone number which sent the money will claim for it.
As the number that sent the money was his and he remembers not to send such amount from his phone number and hence he realized it is the miracle money.