Ta'yini obligation

Priority: a, Quality: b
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From wikishia

Ta’yīnī obligation (Arabic: الواجب التعييني) is an obligation when a person is required to perform a specific action and there is no alternative for it, such as the obligations of prayer and fasting. Its opposite is takhyiri obligation (Disjunctive obligation).

Usage-based Definition

In sources of the principles of jurisprudence, obligation has two forms regarding subject: If the obligation is about a specific and irreplaceable issue such as prayer, it is called ta’yini obligation;[1] and if it is about one of some issues so that the person may choose one and perform it by his own choice, it is called takhyiri obligation, such as the atonement for fasting, when the person should choose between "freeing a slave", "two months fasting" or "feeding 60 poor people".[2]

Majority of obligations are ta'yini obligations and takhyiri obligations are mostly seen regarding the rules of atonements and penalties.[3]

See Also



  • Dānishnāma-yi jahān-i Islām. Madkhal-i Taʿyīnī wa Takhyīrī. (Encyclopedia of Islam, The entry of Taʿyīnī wa Takhyīrī obligation).
  • Farhangnāma-yi Uṣūl al-fiqh. Group of researchers. (Dictionary in principals of jurisprudence). Qom: Pazhūhishgāh-i ʿUlūm wa Farhang Islāmī, 1390 Sh.
  • Sheikh Bahāʾī, Muḥammad Ḥusayn. Zubdat al-uṣūl. Edited by Muḥammad Bāqir Sidhī Iṣfahānī. Iṣfahān: Lithography, 1306 Sh.