Here's a really old freestyle by Nas (With Wiz and Jungle) in 93 before Illmatic came out. You could hear him talking about the album coming out soon, with Nas saying "Just a bunch of sciences, just science", talking about the different producers, and talking about the "It Ain't Hard To Tell".
One of the best freestyles by Nas in his prime, and it was done before the release of Illmatic, which as we all know, would go on to become one of the best Hip Hop albums of all time.
Nas '93 Stretch & Bobbito Freestyle Part 1 Pre Illmatic - YouTube
Happy Birthday Nasir Jones