Matsya Purana 222.9

222.9

sāmnā yadyapi rakṣāṃsi gṛhṇantīti parā śrutiḥ.
tathāpyetadasādhūnāṃ prayuktaṃ nopakārakam .. 222.8 ..

The following is the rule:—Tathyasâma is to be applied in the following manner:—narration of the high pedigree and description of the deeds done for one's benefit and acknowledging one's gratitude, etc. Thus the religious persons are brought under subjection Though it is heard that Rakṣasas are brought over by the use of Sâma, yet it be remembered that it should never be applied in the case of the wicked For no benefits will be derived thereby The policy of conciliation wins all, but it should never be employed in the case of the wicked for they look upon a conciliatory sovereign as one afraid of them Therefore it should never be applied in the case of wicked persons.—8 9