Muslim International Law may be defined as: That part of the law and custom of the land and treaty obligations which a Muslim state observes in its dealings. Imam Muhammad ibn al-Hasan Ash-Shabani- was a pupil of Abu Hanifah and heard hadith from Mis'ar ibn Kidam, Sufyan ath-Thawri, 'Amr ibn Dinar, Malik ibn Maghul, Imam Malik ibn Anas (, al-Awza'i, Rabi'ah ibn Salih, Bakir and Qadi Abu Yusuf. He resided in Baghdad and narrated hadith there. He was Muhammad ibn al-Hasan ash-Shaybani His kunya was Abu 'Abdullah. He was born in 132 and died in 189 AH. He was only about eighteen years old when Abu Hanifa died and had not been with him for a long time, but nonetheless he compiled a more complete study of the fiqh of Iraq than Abu Yusuf. He took from ath-Thawri and al-Awza'i, and travelled to Malik and learned the fiqh of hadith, transmissions and the opinions of Malik, after having learned fiqh of opinion from the Iraqis. He stayed with Malik for three years. He was appointed a qadi under ar-Rashid but was never Chief Qadi. He had great skill in letters and so he had both linguistic training and analytic perception. He was concerned with his appearance so that ash-Shafi'i said about him, "Muhammad ibn al-Hasan fills both the eye and the heart." He also mentioned his great eloquence.