Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 10.4.14

10.4.14

atha yasya prasavy ādityasya āvṛtam anvāvṛttā vakalāḥ / (paśu: yūpa saṃskāra)

is that connected with man; he may use it if he desires; the tree, whose rind grows from left to right in accord with the course of the sun, is that suited for the post and is heavenly. (The tree), which stands alone, unrivalled, or is covered up to the root with shoots, is not bare; it is connected with cattle; it one desiring cattle should use.