The Tantrasara is a work attributed to Abhinavagupta, the most famous historical proponent of the Trika or Kashmir Shaivism philosophy of Hinduism. It is said to be a condensed version of the Tantraloka,, p. 47 Abhinavagupta's masterpiece.
Citations
References
Tantrasara by Abhinavagupta, English translation https://archive.org/details/TantrasaraByH.NChakravarty