Indeed, as the slaughter of the Sindhu ruler in one of my foremost duties. So also the protection of the very virtuous king Yudhishthira is another imperative duty of mine.
यथा परमकं कृत्यं सैन्धवस्य वधो मम। तथैव सुमहत् कृत्यं धर्मराजस्य रक्षणम्॥