Jala'i al-Afham fi Salat wasalam 'Ala Khayri al-Anam (اجلاءالأفهام)

An excellent and unique work of Imam Ibn Qayyim al-Jawziyah where in he discusses and mentions times when Salawat on the Prophet s.a.w is beneficial and what is exactly the Benefits in Sending blessings and Greetings to the Prophet s.a.w. Also he mentions saying of the Pious Predecessors whom used to frequently Send Salaams to the Prophet s.a.w