The object of the verb preṣya and brūhi (imperative singular of divādi verb, meaning 'send' and 'utter') denoting sacrificial food, takes the 6th-Case-affix, when making offerings to deity is meant or when deity is the recipient.,
Ex. अग्नये छागस्य हविषोवपाया मेदसोऽनुब्रूहि प्रेष्य वा 'send to fire as oblation, the goat, the fat, and the marrow.' But not here —अग्नये छागं हविर्वपां मेदो जुहुधि. Because the verb is not preshya or bruhi So also not here अग्नये गोमयान् प्रेष्य. Because it is not an oblation. Not here too माणवकाय पुरोडाशं प्रेष्य. Because the recepient is not a diety. Compare 8.2.91.
Vart:- This rule does not apply when the word 'set out' qualifies the word हविः as; इन्द्राग्निभ्यां छागं हविर्वपां मेदः प्रस्थितं प्रेष्य 'send to Indra and Agni the oblation set out for them' &c.,