Theragāthā Ekakanipāta Dvādasamavagga 1.119. Vajjiputtattheragāthā “Rukkhamūlagahanaṃ pasakkiya, Nibbānaṃ hadayasmiṃ opiya; Jhāya gotama mā ca pamādo, Kiṃ te biḷibiḷikā karissatī”ti. … Vajjiputto thero ….