Dust and Echoes
From Halopedia, the Halo wiki
200px|right Dust and Echoes is a song included in the Halo: Original Soundtrack. It plays during the end of The Maw, in the ending cutscene.
It runs for 2 minutes and 49 seconds.
The intro of the piece is the same as The Maw.
This piece is remade in Halo 3's "Wake Me When You Need Me" track. Both are named after quotes from Cortana and John-117 during the final cutscene from both games.