Caitanya-caritāmṛta 17.162
jarad-gava hañā yuvā haya āra-vāra tāte tāra vadha nahe, haya upakāra
[jarad-gava hanaa yuvaa haya aara-vaara taate taara vadha nahe, haya upakaara]
Blended reading (Sanskrit + English inline)
jarad-gava hañā yuvā haya āra-vāra tāte tāra vadha nahe, haya upakāra
“The killing and rejuvenation of such old and invalid cows was not truly killing but an act of great benefit.
My note
Source: vedabase.io