Skandapurana 6.3.133.26

6.3.133.26

niḥśeṣaṃ bhasmasātkṛtvā hutabhugyāti bhārata .
tasmātsarvaprayatnena brāhmaṇebhyo yudhiṣṭhira .
bhaktiḥ kāryā nṛpaiḥ sarvairicchadbhiḥ śreya ātmanaḥ .. 26 ..

The fire-consumer goes away, O descendant of Bharata, having reduced it completely to ashes. / Therefore, with every effort, devotion must be shown to the brahmins, O Yudhiṣṭhira, / by all kings who desire their own welfare.