Amit Shah urged the party's West Bengal leaders to reach out to the masses and fight for their rights.
A day after Aam Aadmi Party's defeat in the Delhi municipal elections, senior leader Sanjay Singh resigned as its Punjab in-charge.
Over 70% of the 2,516 candidates, including 40 of the AAP and 92 of the Congress, lost their security deposit in MCD polls.
Except BJP candidate Rubeena Begum from Quraish Nagar, the four remaining Muslim candidates of the party finished a distant third.
A BJP candidate in a south Delhi ward trounced his AAP rival by a whopping 9,866 votes, the highest winning margin in municipal corporation elections.
Delhi Chief Minister Arvind Kejriwal congratulated the BJP for its victory in the civic polls and assured his party's support for Delhi's betterment.
BJP's landslide victory in the Delhi municipal polls can be credited to a "Modi wave", the AAP's debacle signals the bursting of a political bubble, experts said.
The BJP was set to retain its hold on Delhi civic bodies, winning 143 and leading in 31 of the 270 wards, while the AAP was at a distant second with 35 wins and 16 leads.
Modi expressed gratitude to the people of Delhi by reposing faith in the BJP and ensuring its resounding victory in MCD polls.