I could not find any information on "Safinatu Salaad Sh umal". However, I found that there is a book called "Safinatu al-Salaat" which is a commentary on "Umm al-Salaat".
Umm al-Salaat is a fundamental text in Islamic jurisprudence, specifically in the Shafi'i school of thought. The book is written by Imam Muhammad ibn Idris al-Shafi'i, the founder of the Shafi'i school.
Umm al-Salaat is a comprehensive book on Islamic jurisprudence that covers various aspects of worship, transactions, and social interactions. The book is considered a primary source of reference for Shafi'i jurisprudence and serves as a foundation for understanding the Shafi'i school of thought.