SN 4.23

uddhaṃ adho ca tiriyaṃ, disā anudisā sv'ahaṃ, anvesaṃ n'ādhigacchāmi, godhiko so kuhiṃ gato'ti.

Snp 4.13

patthayamānassa hi jappitāni, pavedhitaṃ vā'pi pakappitesu, cut'ūpapāto idha yassa n'atthi, sa kena vedheyya kuhiṃ'va jappe.