Rig Veda
प्रेतां॑ य॒ज्ञस्य॑ श॒म्भुवा॑ यु॒वामिदा वृ॑णीमहे । अ॒ग्निं च॑ हव्य॒वाह॑नम् ॥ प्रेतां यज्ञस्य शम्भुवा युवामिदा वृणीमहे । अग्निं च हव्यवाहनम् ॥
May the two, (Heaven and Earth), who confer good fortune upon the sacrifice, proceed (to the altar); for verily, we implore you both (to com), as well as Agni the bearer of oblations.
english translation