Just Sitting -- Smithstonian, the first track of Super Funk Is Back Vol 5, Rare and Classic Funk 1968-1977.
The link takes you to a page where you can hear a taste of each track on the disc. I heard "Just Sitting" during Preachin The Blues with Johnny Horn, Johhny Horn on KEXP (Sundays, 10 am to noon). I heard the track and went and bought the cd just for that track. The rest is pure profit. Ohhh yeah.