One of known characteristics of al-Layth jurisprudence was his rejection towards Maliki usage of Madina custom as an independent source of law.
[1] Al-Layth ibn Sa'd was born in Egypt of Persian parentage in the year 716.
After an extensive study of all the then-known areas of Islamic learning, al-Layth became Egypt's major scholar.
[1] Al-Layth's school disappeared shortly after his death in 791 for three key reasons.
The first is that he neither compiled, dictated, nor instructed his followers to record his legal opinions and their proofs, so little remains from his school beyond a few references in early books of comparative Fiqh.