Atharvaveda 8.10.18

8.10.18

sód akrāmat sā́ vánaspátīn ā́gachat tā́ṃ vánaspátayo 'ghnata sā́ saṃvatsaré sám abhavat |
tásmād vánaspátīnāṃ saṃvatsaré vr̥kṇám ápi rohati vr̥ścáte 'syā́priyo bhrā́tr̥vyo yá eváṃ véda ||18||

She ascended; she came to the forest trees; the forest trees slew her; she in a year came into being; therefore what is cut of the forest trees grows over in a year; cut off (vraçc) is his unfriendly foe (bhrā́tṛvya) who knoweth thus.