TA'YINI and TAKHYIRI

This is yet another classification of WAJIB acts. WajibeTa'yini relates to those particular acts which have been specifically identified as obligatory, like the daily prayers, fasting, Haj, Khums, Zakat, Amir bil Maroof, Jehad etc. But WajibeTakhyiri offers choice and alternatives, like in the case of kaffara for a person who has deliberately left out a fast in the month of Ramadhan. He will either free a slave, or feed sixty deserving poor, or keep sixty fasts.

Adapted from the book: "Fiqh and Fuqaha"