Never a man to miss a political opportunity, Gujarat Chief Minister Narendra Modi took a dig at Prime Minister Manmohan Singh on Thursday, using the occasion of Dr BR Ambedkar's birth anniversary. "I am pained that India's PM Dr Manmohan Singh, who is a voter in Assam, did not go to Assam to vote in the crucial Assembly elections. This is painful news for the people of this country, and more so on the occasion of Dr Ambedkar's birth anniversary," Modi said.