Sekhasutta 23.6

23.6

yampi, mahānāma, ariyasāvako catunnaṃ jhānānaṃ ābhicetasikānaṃ diṭṭhadhammasukhavihārānaṃ nikāmalābhī hoti akicchalābhī akasiralābhī, idampissa hoti caraṇasmiṃ.

and getting the four absorptions when they want, without trouble or difficulty.