Al-Kasani

His major work entitled Bada'i' al-Sana'i' fi Tartib al-Shara'i' (Arabic: بدائع الصنائع في ترتيب الشرائع) is one of the most important Islamic legal manuals of the Hanafi tradition.

Here he made an argument with another Jurist, in which he appeared so violent that the ruler Mas'ud I considered it impossible to keep him at the court.

[5] Since al-Kāsānī had made himself impossible by his behavior at the court, the ruler sent him on the advice of his vizier as ambassador to Nur ad-Din Zengi at Aleppo.

Here he was appointed as successor of Radī ad-Dīn as-Sarachsī (died 1149) professor of Hanafi law at the Madrasa Hallāwīya.

Whenever he had any doubts and erred in issuing a fatwa, she would inform him the correct judgment and explain the reason for the mistake.

[8][9] Al-Kasani's main work is his handbook Bada'i' al-Sana'i' fi Tartib al-Shara'i' (Arabic: بدائع الصنائع في ترتيب الشرائع), which occupies seven volumes in the modern print edition.