.

Shaykh Jalaluddin Thanesari (Allah have mercy on him d.989 Hijra) said,

‘The seeker of truth suffices in the spiritual involvement (shugal e batini, i.e. methods of developing remembrance, concentration and awareness) after fulfilling the essential (faraidh) and Sunna actions. He does not stress on physical worship and supererogatory (nawafil) actions like the ascetics.’

Irshad ut Talibeen, page 11