Prime Minister Narendra Modi will on Saturday lay the foundation stone for a Rs 100-crore temple dedicated to the 14th-century mystic poet and social reformer Sant Ravidas in poll-bound Madhya Pradesh's Sagar district, where he will also address a public meeting, a state BJP minister said.This will be PM's second visit to the Bharatiya Janata Party (BJP)-ruled state, where assembly polls are due by the year-end, in just over a month.