Bhaddekarattasutta 9.3

9.3

na rūpaṃ attato samanupassati, na rūpavantaṃ vā attānaṃ, na attani vā rūpaṃ, na rūpasmiṃ vā attānaṃ;

They don’t regard form as self, self as having form, form in self, or self in form.