Sorry, but that is just not correct. You don't get any dividend after a week if you delegate.
You get nothing. That is why there are delegation services like DLease. The delegatee (receiver) needs to pay up front, and the service pays out a daily amount to the delegator. The service is the middleman that automates the payout.
If I just delegate you any amount of Hive Power, I get literally ZERO return on that.