त्वम् you, ब्रह्मर्षि: are a Brahmarshi, सन्देह: न no doubt, तव to you,सर्वम् all, सम्पत्स्यते will be achieved (ascetic perfection), इति so, उक्त्वा having said, सर्वा: all, देवता: devatas, यथागतम् where they had come from, जग्मु: went away.

"You are a Brahmarshi, no doubt. You will achieve ascetic perfection", said the gods and returned to their respective places from where they had come.