Śatapatha Brāhmaṇa ("of a hundred paths") 9.2.3.39

9.2.3.39

atha vaikaṅkatīmādadhāti | tasyā ukto bandhurvidhema te parame janmannagna iti dyaurvā asya paramaṃ janma vidhema stomairavare sadhastha ityantarikṣaṃ vā avaraṃ sadhasthaṃ yasmādyonerudārithā yaje tamityeṣa vā asya svo yonistaṃ yaja ityetatpra tve havīṃṣi juhure samiddha iti yadā vā eṣa samidhyate 'thaitasminhavīṃṣi prajuhvati

He then puts on one of vikaṅkata (flacourtia sapida) wood--the significance whereof has been explained--with (Vâg. S. XVII, 75), 'To thee give we honour, O Agni, in the highest home;'--his highest home, doubtless, is the sky;--'to thee give we honour, in hymns of praise, in the lower abode;'--the lower abode, doubtless, is the air;--'the birth-place whence thou hast arisen do I worship,'--that is, 'this is his (Agni's) own birth-place: that I worship;'--'on thee, when kindled, offerings are poured forth;'--for when he (the fire) is kindled, they make offerings on him.