Nas and The Notorious B.I.G. were NYC contemporaries.  However, they never recorded a track together.

Nas explained why on The Breakfast Club during his press run for his latest album King's Disease.

Nas explains why him and Biggie never got to do a song together pic.twitter.com/iCSgKxp6hX

— RapCentury (@RapCentury_) August 25, 2020

"I got too high," said Nas during his Breakfast Club interview. "I was in the studio and Big was rolling up some of that Chocolate from Brooklyn and he didn’t warn me. You know, I was zonked out, yo. There’s pictures of that session out there. I think, yeah, we were supposed to do a couple of songs. I was going to remix some stuff for Ready To Die ... One of them I did was ‘Gimme The Loot.'"

And why didn't he just return the next day and finish the records?

"Still high.  I'm not messing with Big and that smoke," Nas admitted. "Things happened, I lived far out in Long Island at the time, coming to the city was like a mission. It was hard to get me to move, man.  I was good where I was at."