Shatapatha Brahmana 4.5.1.11

4.5.1.11

sa yaḥ sahasraṃ vā bhūyo vā dadyāt | sa enāḥ sarvā ālabheta sarvaṃ vai tasyāptam bhavati sarvaṃ jitaṃ yaḥ sahasraṃ vā bhūyo vā dadāti sarvametā evameva yathāpūrvam maitrāvaruṇīmevāgre 'tha vaiśvadevīmatha bārhaspatyam

And whosoever gives a thousand or more (cows to the priests), he will slaughter all these;--indeed, everything is obtained, everything conquered by him who gives a thousand or more. Those (three) cows are everything, (when offered) thus in the proper order: first one to Mitra and Varuna, then one to the All-gods, then one to Brihaspati.