Its the scene in season 2 episode 4 when Furfur is trying to pronounce Aziraphale’s name

Crowley is laying on the couch while you stand next to the couch he’s on while you watch Furfur and Aziraphale

F: “Azirapapap… Azifafelala…”

A: He sighs “Aziraphale.” He says in a low, kinda seductive voice