Shiva Purana
सर्वातिथ्यं त्रिवर्गस्य भूतेभ्यो दीयतामिति ॥ गोब्राह्मणात्मनोऽर्थं हि संग्रामाभिहतो भवेत् ॥ १४॥
Give all hospitality to the beings of the three worlds. For the sake of a cow or a brahmin he may be killed in battle.
english translation
sarvAtithyaM trivargasya bhUtebhyo dIyatAmiti ॥ gobrAhmaNAtmano'rthaM hi saMgrAmAbhihato bhavet ॥ 14॥
hk transliteration by Sanscript