What is the name of the pentalogy which features Dedication 3 and Dedication 4?
Dedication 4 Dedication 4 is a mixtape by Lil Wayne. The mixtape was originally supposed to be released on August 15, 2012, but got pushed several times  and was released on September 3, 2012. It is the fourth installment of Lil Wayne's "Dedication" series, following its predecessors "The Dedication", "Dedication 2" and "Dedication 3". It's also the fourth installment of Lil Wayne's "Gangsta Grillz" pentalogy.
Psalms The Book of Psalms (Hebrew: תְּהִלִּים‎ ‎ or , "Tehillim", "praises"), commonly referred to simply as Psalms or "the Psalms", is the first book of the "Ketuvim" ("Writings"), the third section of the Hebrew Bible, and a book of the Christian Old Testament. The title is derived from the Greek translation, ψαλμοί "psalmoi", meaning "instrumental music" and, by extension, "the words accompanying the music." The book is an anthology of individual psalms, with 150 in the Jewish and Western Christian tradition and more in the Eastern Christian churches. Many of the psalms are linked to the name of David, but his authorship is not accepted by modern Bible scholars.