“Perhaps home is not a place but simply an irrevocable condition.”

Logic of Empire (p. 335); this is one of the earliest known variants of an idea which has become known as Hanlon's razor.
Short fiction, The Past Through Tomorrow (1967)
Source: The Green Hills of Earth

Source: The Wonderful Wizard of Oz

Source: Works and Days (c. 700 BC), line 365.

Source: The Boy Crisis (2018), pp. 203

Source: Vorkosigan Saga, Barrayar (1991)

"What — No Budapest", My Ten Years in a Quandary and How They Grew (1936)

Venus on the Half-Shell (December 1974); written using the pseudonym Kilgore Trout, with the permission of Kurt Vonnegut.

Variant: I’ve learned that home isn’t a place, it’s a feeling.
Source: Love, Rosie