If the grooms parents are hosting the wedding, here is a simple template you can use to write a wedding invitation with the grooms parents hosting.
We are pleased to invite you to the wedding of (name of bride and groom).
The church ceremonies at (name of church) will promptly start at 4pm while the reception at (name of location) will start at 7pm. It will be held on (date of wedding).
Hope to see you there in your best attire.