As your son is going to the forest for the sacrificial fire and for his superiors, you ought not to prevent him. Had it been for any other (business) he should have been prevented.
गुर्वग्निहोत्रार्थकृते प्रस्थितश्च सुतस्तव। न निवार्यो निवार्यः स्यादन्यथा प्रस्थितो वनम्॥