Manusmriti Chapter 5 Verse 31 -

"There is no sin in eating meat, nor in drinking wine, nor in sexual intercourse. That is the natural activity of living beings. But abstention (from these) bears great fruit."

न मांसभक्षणे दोषो न मद्ये न च मैथुने । प्रवृत्तिरेषा भूतानां निवृत्तिस्तु महाफला ॥ ३१ ॥ manusmriti chapter 5 verse 31

na māṃsa-bhakṣaṇe doṣo na madye na ca maithune | pravṛttir eṣā bhūtānāṃ nivṛttis tu mahā-phalā || 31 || "There is no sin in eating meat, nor