पानं पानीयं चाउषधेन व्याख्यातम् ॥ कZ_०१.२१.११ ॥
pānaṃ pānīyaṃ ca auṣadhena vyākhyātam ।
饮品与饮用水应按与药物相同的程序加以管制(即实行同等的核验控制)。
Extension by analogy: once a strict control is defined for medicine, the same control is applied to beverages and water without restating the full procedure.
Because both are direct ingestion vectors; water is a high-frequency, low-suspicion channel for poisoning.