तव to you, स्वागतम् इति welcome (saying so), महात्मना by the magnanimous, वसिष्ठेन by Vasishta, उक्तश्च spoken also, भगवान् adorable, वसिष्ठ: Vasishta, अस्य for him, आसनं च seat also, व्यादिदेश ह ordered.
Adorable Vasishta received Viswamitra with words of welcome and ordered a seat for him.