Just add some search terms (you can use AND/OR), specify a Slack channel, and you're done! (Note: disable URL shortening in IFTTT settings, so Slack can preview the tweet)
If
New tweet from search
This Trigger fires every time a new tweet matches your search query. Limited to 30 tweets per check, and protected tweets will not be returned.
Fewer details
Discover more time saving integrations for Slack and Twitter