Ud 3.4

yathā'pi pabbato selo, acalo suppatiṭṭhito, evaṃ mohakkhayā bhikkhu, pabbato'va na vedhatī'ti.

AN 7.67

seyyathā'pi rañño paccantime nagare esikā hoti gambhīranemā sunikhātā acalā asampavedhī abbhantarānaṃ guttiyā bāhirānaṃ paṭighātāya. evam'evaṃ kho ariyasāvako saddho hoti, saddahati tathāgatassa bodhiṃ