The Vedanta Sutras, commentary by Sankaracharya (SBE34), tr. by George Thibaut  at sacred-texts.com
32. And on account of its general deficiency in probability.
No further special discussion is in fact required. From
whatever new points of view the Bauddha system is tested with reference to its probability, it gives way on all sides, like the walls of a well dug in sandy soil. It has, in fact, no foundation whatever to rest upon, and hence the attempts to use it as a guide in the practical concerns of life are mere folly.--Moreover, Buddha by propounding the three mutually contradictory systems, teaching respectively the reality of the external world, the reality of ideas only, and general nothingness, has himself made it clear either that he was a man given to make incoherent assertions, or else that hatred of all beings induced him to propound absurd doctrines by accepting which they would become thoroughly confused.--So that--and this the Sûtra means to indicate--Buddha's doctrine has to be entirely disregarded by all those who have a regard for their own happiness.