ཤ་ར་དྭ་ཏིའི་བུ་དེ་དག་ནི་དེ་བཞིན་གཤེགས་པའི་སྟོབས་བཅུ་ཡིན་ནོ། །
“Śāradvatī­putra, if you ask what are the ‘four assurances’ [proclaimed by the tathāgatas], they are as follows: “ (1) When I claim to have attained genuinely perfect buddhahood, if some virtuous ascetic, brāhmin, god, demon, Brahmā, or anyone else should say that I have not attained manifestly perfect buddhahood with respect to these particular phenomena here, I would correctly disregard that reason for contradicting me, based on their worldly doctrines.
Perfection of Wisdom, Buddhists, Spiritual Practice