Skandapurana 16.282.9

16.282.9

agṛhṇāccyavanaḥ somamaśvinordevayostadā ..
tamindro vārayāmāsa mā gṛhāṇa tayorgraham .. 8...
.. indra uvāca .. ..
ubhāvetau na somārhau nāsatyāviti me matiḥ ..
bhiṣajau devatānāṃ hi karmaṇā tena garhitau .. 9 ..

Cyavana then took the soma draught for the two gods, the Aśvins; / Indra prevented him: 'Do not take a cup for those two!' / Indra said: / 'These two are not worthy of soma, the two Nāsatyas—such is my view. / For they are the physicians of the gods, despised on account of that occupation.'