The southern rays of the sun are the honey-cells on the right. The Yagus verses are the bees, the Yagur-veda sacrifice is the flower, the water (of the sacrificial libations) is the nectar (of the flower).

In plain words: The sun's southern rays are like honeycomb cells on the right. The verses of the Yajur Veda, the book of ritual formulas, are the bees. Its ritual is the flower, and the offered water is the nectar.