NEW DELHI, Aug 2 (Reuters) - India will keep purchasing oil from Russia despite U.S. President Donald Trump's threats of penalties, two Indian government sources told Reuters on Saturday, not wishing to be identified due to the sensitivity of the matter. On top of a new 25% tariff on India's exports to the U.S., Trump indicated in a Truth Social post last month that India would face additional penalties for purchases of Russian arms and oil. On Friday, Trump told reporters he had heard that India would no longer be buying oil from Russia.But the sources said there would be...