Mantra 8

यथाश्मानमाखणमृत्वा विध्वंसत एवं हैव स विध्वंसते य एवंविदि पापं कामयते यश्चैनमभिदासति स एषोऽश्माखणः ॥ १.२.८ ॥

In plain words

As a clod is shattered when it strikes a rock, so is he shattered who wishes evil to one who knows this, and he who does him harm; for this one is a rock.