BENGALURU, May 21 (Reuters) - State Bank of India, the country’s largest lender by assets, posted a record quarterly profit on Friday, as provisions for soured assets slid. Net profit rose 80% to 64.51 billion rupees ($883.09 million) for the three months ended March 31, from 35.81 billion rupees a year earlier, SBI said in a regulatory filing here. ($1 = 73.0500 Indian rupees) (Reporting by Chris Thomas in Bengaluru) Our Standards: The Thomson Reuters Trust Principles.