If I attain Buddhahood and a sentient being aspires with faith and joy to be reborn in my Sukhavati Pure Land: if they recite my name just ten times and, in spite of this, are not reborn there, then may I myself not attain enlightenment [in the first place]. Two exceptions to this solemn promise are in respect of, firstly, those who have committed the five terrible offences and, secondly, of those who have vilified the Sublime Dharma because such people cannot be reborn in Sukhavati.
— Amitabha Buddha