Shiva Purana
स्वधान्यभक्षणासक्तां गां दृष्ट्वा गौतमस्तदा ॥ तृणेन ताडयामास शनैस्तां संनिवारयन् ॥ ३०॥
On seeing a cow eating his food-grains, Gautama struck it mildly with a blade of grass trying to ward it off.
english translation
svadhAnyabhakSaNAsaktAM gAM dRSTvA gautamastadA ॥ tRNena tADayAmAsa zanaistAM saMnivArayan ॥ 30॥
hk transliteration by Sanscript