An earlier example is found in "Stage Fright" (1x03) when Echo assumes the persona of Jordan, perhaps the most Faith-like of her Dollhouse characters (right down to a common South Boston upbringing). After the pop star Rayna Russell fires Jordan from her squad of backup singers, her retort is remarkably similar to a line by Faith as she argues with Buffy in "Faith, Hope, and Trick":
Echo/Jordan: "You can fire me, but bitch, don't think you can take me!"
Faith (threateningly to Buffy): "Wow. Think you can take me?"