Ramayana
रक्षामेति च यैरुक्तं राक्षसास्ते भवन्तु वः । जक्षाम इति यैरुक्तं यक्षा एव भवन्तु वः ॥ 7-4-13 ॥
Those of you who said "We will guard" (raksham), let them become Rakshasas; and those of you who said "We will devour" (jaksham), let them become Yakshas.
english translation