A nice collection of samples from 9th Wonder
From wikipedia: Patrick Douthit (born January 15, 1975 in Winston-Salem, North Carolina), better known as 9th Wonder is a hip hop record producer, record executive, DJ, lecturer, and Rapper from Durham, North Carolina, U.S. He began his career as the main producer for the group Little Brother, and has also worked with Mary J. Blige, Jean Grae, Wale, Jay-Z, Murs, Drake, Buckshot, Chris Brown, Destiny’s Child, J. Cole, Kendrick Lamar, Erykah Badu, Ludacris, Mac Miller, David Banner, and Lecrae. As of 2010, 9th Wonder raps under the name of 9thmatic.
9th Wonder has a smooth and soulful production style that relies on samples from artists such as Al Green and Curtis Mayfield. He attributes the bass lines that he uses in production to DJ Premier, Pete Rock and J Dilla, while he claims to have learned the sampling of “Wails and moans” from other works of music and where to position them in his songs from RZA.