Tribe use a sample at 1:50 of the horn line from Tyrone Washington's Submission (from 20 seconds in).

Pete Rock & C.L. Smooth use a chopped up version of the same horn part at the very beginning of their song Can't Front On Me.

Both Pete Rock & C.L Smooth and the Ultramagnetic MCs sample the beat from Synthetic Substitution.

It's pretty subtle but I believe the Ultramagnetic MCs and OutKast scratch on this little bit in It's Yours.

OutKast samples the 'title track' vocal part from Aretha Franklin's Rock Steady (2:28). It appears at (for example) 1:24 in OutKast. A Tribe Called Quest use the same part in "Show Business".

De La Soul and Tribe both grab their beat from Funky President. De La Soul also use this very cool hook that appears 18 seconds into Rock Creek Park by the BlackByrds.

That little riff that sneaks in at 15 seconds in Blue Lines is from Rock Creek Park...

...and Massive Attack's beat from the very beginning is from Sneakin' In the Back.