Prime Minister Narendra Modi commended Vice President M Venkaiah Naidu's "diligent" work ethic in the Rajya Sabha today, as the upper house bid farewell to its Chairman. "He never considered work a burden," Prime Minister Modi said. Mr Naidu demits office on Wednesday and his successor Jagdeep Dhankhar will take the oath of office on August 11. "Your one liners are also wit-liners," Prime Minister Modi said. "His command over the languages has always been great ... There is both depth and substance in what he says."