 न शक्या यज्ञमध्यस्था वेदी सृग्भाण्डमण्डिता।द्विजातिमन्त्रपूता च चण्डालेनावमर्दितुम्।। 
 The sacrificial altar adorned with ladles and vessels and sanctified by the sacred mantras recited by brahmins cannot be defiled by a chandala man of lowest caste.  