What is a third invalidator of the fast and what is the evidence for it?

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Drinking invalidates the fast and the evidence is in the following verse:

So now have sexual relations with them and seek that which Allah has ordained for you (offspring), and eat and drink until the white thread (light) of dawn appears to you distinct from the black thread (darkness of night), then complete your sawm (fast) till the nightfall” [Al-Baqara, 2:187]