SAHIBU ‘N-NISAB. صاحب النصاب
A legal term for one possessed of a certain estate upon which zakat, or “legal alms,” must be paid. Also for one who has sufficient means to enable him to offer the sacrifice on the great festival, or to make the pilgrimage to Makkah. The possessor of 200 dirhems, or five camels, is held to be a Sahibu ‘n-Nisab, as regards zakat.
Based on Hughes, Dictionary of Islam