Matsya Purana 59.6

59.6

sūcyā sauvarṇayā kāryaṃ sarveṣāṃ karṇavedhanam.
añjanañcāpi dātavyaṃ tadvaddhemaśalākayā.. 59.5 ..

Then with a needle of gold, the Karṇavedha ceremony should be performed on the tree and, similarly, with the same golden stick the eyes of the tree should be painted with black pigment.—6.