Brihat Samhita
श्रेष्ठो अर्जुनो अजकर्णः प्रियकधवौदुम्बराश्च पञ्चैते । एतेषां एकतमं प्रशस्तं अथ वाअपरं वृक्षम् ॥ ४२-१५ ॥
The five trees—Arjuna, Aśvakarṇa, Priyaka, Dhava and Udumbara, are suited for the purpose. Either one of these or some other well-known tree, or some tree growing on yellow or black soil shall be selected by the astronomer who, alone and at night, approaching the same, shall touch it and address it with the following hymns.
english translation
zreSTho arjuno ajakarNaH priyakadhavaudumbarAzca paJcaite । eteSAM ekatamaM prazastaM atha vAaparaM vRkSam ॥ 42-15 ॥
hk transliteration by Sanscript