To make this work, replace "subreddit" with a subreddit of your choice, and change when you want the weekly digest send to you.
If
New hot post in subreddit
This Trigger fires every time a new post becomes one of the ten hottest posts in the subreddit you specify.
Then
Add to weekly email digest
This Action will add an item to your weekly digest sent once a week on the day and time you specify.
Explore more great ways to automate Reddit and Email Digest