Skandapurana 5.65.25

5.65.25

athāsau prāha taṃ śūdramatithe kuru bhojanam ..
svecchayā piba toyaṃ ca śreyo yena bhavenmama .. 25 ..

Then he said to that Śūdra: “O guest, take your meal; / and drink water at will, so that welfare may come to me.”