L.A. producer Mustard's new single is full of promises. "On God" features guest rappers A$AP Ferg, A$AP Rocky, YG, and Tyga making a series of sacred oaths about their outlandish wealth, success, and grit. The gravity of the rappers' proclamations is boosted by Mustard's synthetic orchestral beat, lending a bit of breadth to what could have been a standard club-driven posse cut. Listen above. "On God" appears on Mustard's upcoming album Perfect 10, out June 28. The project will also contain the songs "Pure Water" featuring Migos and "100 Bands" with Quavo, 21 Savage, YG, and Meek Mill.