Rukhṣa (Arabic رخصة, concession, alleviation, facilitation, permission, plural rukhaṣ رخص) is a technical term in the discipline of uṣūl al-fiqh in Islamic law that is mostly applied on ibadah.
Other permissions are based on sayings of the Islamic prophet Muhammad, like denying the own faith in case of danger to life.
((ar-ruḫṣa min Allāh ṣadaqa fa-lā taruddū ṣadaqata-hū)[1] Sufis, however, were often called to seek the divine reward that results from adhering to the 'aza'im.
He developed there, with reference to the two principles Ruchsa and 'Azīma, the doctrine that the sharia had come down altogether in two stages, namely at the level of "mitigation" (takhfif) and the degree of "aggravation"(tashdid), each aimed at different groups of people.
Asch-Sha'rānī describes in his treatise how he received this teaching from Khidr, who traveled with him in seclusion and showed him the source of pure Sharia.