Sunan Al Kubra Bayhaqi.pdf !full! -

It is a virtual encyclopedia of Islamic rulings, often cited by later Shafi'i scholars like al-Nawawi and Ibn Hajar.

Born in the town of Bayhaq in present-day Iran, Imam al-Bayhaqi was a Shafi'i jurist, hadith master (hafiz), and an expert in legal methodology (usul). He studied under towering figures such as al-Hakim al-Nishapuri and Abu Bakr al-Bayhaqi (no relation). His mastery lay in harmonizing hadith with fiqh (jurisprudence), earning him the title "Shaykh of the Shafi'iyyah." Sunan Al Kubra Bayhaqi.pdf