لَا فِيهَا غَوْلٌ
There is no harmful intoxication in it.
Here «lā» negates the harmful effect, while «fīhā» is fronted. The source reads this in a contrastive setting: the drink under discussion is free of the harm that may occur in other drinks.
Its rhetorical force is not just a bare denial. The advanced placement of the locative helps distinguish this drink from contrasting ones. The exclusivity is relative to the comparison; it is not an unlimited claim about every substance or attribute.