They that tarry long at the wine; they that go to seek mixed wine.
– Proverbs 23:30
[V]erse 30 answers the riddled verse 29. The word for tarry long means to loiter, or stay. It describes on who is constantly drinking wine and being drunk. The word for wine refers to fermented drinks, which are intoxicating (See commentary Proverbs 20:1). The word for mixed wine means a mixture. This wine could have various ingredients added to it, typically to increase its potency (Proverbs 9:2). This fits with the context of the saying. Abusing substances such as alcohol does increase the tolerance to the substance and stronger substances have to be sought.