A Simple Tactic I Missed in the Benko Gambit

Black to move

White Pieces: Ke1 Qd1 Ra1 Rh1 Bb2 Bf1 Nc3 Ng1 a2 c4 d5 e4 f2 g2 h2

Black Pieces: Ke8 Qd8 Ra8 Rh8 Bc8 Bg7 Nb8 Nf6 a7 c5 d6 e7 f7 g6 h7