Mbh 13.151.2a

"'Bhishma said, "The humiliation of Brahmanas would humiliate the very deities. By bowing unto Brahmanas one does not, O Yudhishthira, incur any fault. They deserve to be worshipped. They deserve to have our salutations. Thou shouldst behave towards them as if they are thy sons. Indeed, it is those men endued with great wisdom that uphold all the worlds. The Brahmanas are the great causeways of Righteousness in respect of all the worlds. Their happiness consists in renouncing all kinds of wealth. They are devoted to the vow of restraining speech. They are agreeable to all creatures, and observant of diverse excellent vows. They are the refuge of all creatures in the universe. They are the authors of all the regulations which govern the worlds. They are possessed of great fame. Penances are always their great wealth. Their power consists in speech. Their energy flows from the duties they observe. Conversant with all duties, they are possessed of minute vision, so that they are cognizant of the subtlest considerations. They are of righteous desires. They live the observance of well-performed duties. They are the causeways of Righteousness. The four kinds of living creatures exist, depending upon them as their refuge. They are the path or road along which all should go. They are the guides of all. They are the eternal upholders of all the sacrifices. They always uphold the heavy burdens of sires and grandsires. They never droop under heavy weights even when passing along difficult roads like strong cattle. They are attentive to the requirements of Pitris and deities and guests. They are entitled to eat the first portions of Havya and Kavya. By the very food they eat, they rescue the three worlds from great fear. They are as it were, the Island (for refuge) for all worlds. They are the eyes of all persons endued with sight. The wealth they possess consists of all the branches of knowledge known by the name of Siksha and all the Srutis.