Mahabharata 3.160.25

अस्तं प्राप्य ततः संध्यामतिक्रम्य दिवाकरःउदीचीं भजते काष्ठां दिशमेष विभावसुः

astaṃ prāpya tataḥ saṃdhyāmatikramya divākaraḥudīcīṃ bhajate kāṣṭhāṃ diśameṣa vibhāvasuḥ

Our plain-language meaning of this verse is waiting for scholar review.