Darlington grabbed their fifth straight win to keep in touch with the League Two leaders as they thrashed Lincoln.
The Quakers never looked back after Richie Foran ran clear and struck with a low shot after 11 minutes.
Lincoln's Louis Dodds put a header over from six yards before Clark Keltie put away a penalty to make it 2-0 after Dany N'Guessan handled.
Shortly before half-time, Micky Cummins converted Gregg Blundell's cross and Cummins' header completed the rout.
Lincoln City: Smith, Green, Bencherif, Hone, Beevers, N'Guessan, Frecklington, Kerr (Hand 55), Dodds (Warlow 55), Forrester, Stallard (John-Lewis 54).
Subs Not Used: Marriott, Moses.
Darlington: Stockdale, Purdie, Foster (Miller 77), White, Ridley, Blundell (Austin 73), Cummins, Keltie, Wright (Abbott 66), Joachim, Foran.
Subs Not Used: Oakes, McBride.
Goals: Foran 11, Keltie 32 pen, Cummins 45, 51.
Ref: Graham Horwood (Bedfordshire).