Janamsakhis also mention Guru Nanak Dev's
being made a prisoner at the hands of
Babar's men. He was made to grind corn
with a hand-driven millstone (chakki in
Punjabi), but his captors were surprised
to see that the millstone revolved by
itself while the prisoner only poured
grist into it. When the miracle was reported
to Babar, he himself came to the Guru,
and after talking to him he set free not
only the Guru but all other prisoners
too, many of whom became the Guru's followers.
The millstone was preserved as an object
of veneration and much later, a Gurdwara
was established where the millstone was
kept, it is named Gurdwara Chakki Sahib.
Its present building is a simple flat-roofed
room with some ancillaries and a brick
paved compound, inside the town.