فتح باب العناية-الخير

Fath Bab al-Inayah

The new, high-quality, muhaqqaq edition of this book that is filled with adillah, esp. from hadith.

Highly-praised by masters like Allamah Kashmiri, Shaykh Abd al-Fattah Abu Ghaddah etc, it is probably the best book for finding proof from hadith for Hanafi Furu'.