Vidura, Sanjaya and the highly intelligent Yuyutsu, who was Dhritarashtra's son by his Vaishya wife, used to wait upon Dhritarashtra.
धृतराष्ट्रमुपातिष्ठद् विदुरः संजयस्तथा। वैश्यपुत्रश्च मेधावी युयुत्सुः कुरुसत्तम॥