Return to Ikora Rey in the Hall of Guardians at the Tower.
"Hey, you made it back from a Nightfall! Good! Listen, Shaxx is after me. No, not literally…whole Tower would've heard the gunfire. He banned one of my bookies from the Crucible. So I, uh, made a bet in your name. Don't worry! Shaxx is none the wiser, and I made it up to you. Just talk to Ikora." —Cayde-6