βουλῦτόνδε
[βοῦς + λύω + -δε 1. To the time for unyoking oxen.]
To or towards early afternoon: Ἠέλιος μετενίσετο β. Il. 16.779: = Od. 9.58. (The time specified is fixed for Il. 16.779, and is admissible for Od. 9.58.
The reference seems to be to a custom of stopping ploughing at or soon after mid-day.)