Śatapatha Brāhmaṇa ("of a hundred paths") 1.3.3.20

1.3.3.20

yadi pālāśānna vindet | atho api vaikaṅkatā syuryadi vaikaṅkatānna vindedatho api kārṣmaryamayāḥ syuryadi kārṣmaryamayānna vindedatho api vailvāḥ syuratho khādirā atho audumbarā ete hi vṛkṣā yajñiyāstasmādeteṣāṃ vṛkṣāṇām bhavanti

Should he be unable to procure them of Palâsa wood, they may be of Vikankata wood (Flacourtia Sapida); and if he be unable to procure any of Vikankata, they may be of Kârshmarya wood (Gmelina Arborea); and if he be unable to procure any of Kârshmarya wood, they may be of Vilva (Aegle Marmelos), or of Khadira (Acacia Catechu), or of Udumbara wood (Ficus Glomerata). These, doubtless, are the trees that are suitable for sacrificial purposes, and from these trees they (the enclosing-sticks) are therefore (taken).