When did that happen?it was kakashi is manga fact actually lol , i don't know which chapter , but i know that hiruzen told kakashi for him to do that , you even see kakashi going to the house of naruto , grabbing his milk , and so on.
Pretty much this.Hiruzen only gave him money , as soon as Naruto started walking he got rid of him .....Naruto was alone his entire childhood .
I think they are referencing this.When did that happen?