Skandapurana 5.25.30

5.25.30

āvābhyāṃ saṃpraviṣṭābhyāṃ vahnau putra tatastadā ..
mauṃjīhomastvayā kāryo māṃ tātaṃ yadi manyase .. 6.25.30 ..

“Only when the two of us have entered the fire, son, / is the burning on the muñja-grass pyre to be done by you, if you regard me and your father.”