If you are looking for official, high-quality collaborations between the two, check out: "Black Friday" : A 2015 release where they remix each other's songs ("Alright" and "A Tale of 2 Citiez"). "Under the Sun"
I will write a detailed, helpful article about:
Below is the definitive history of the track, its recent "leak" via J. Cole himself, and why you should be cautious of unofficial download sites. 1. The Origin of "Temptation"