The Allman Brothers Band performed "Whipping Post" on September 23, 1970 at the Fillmore East. The band consisted of Duane Allman, Gregg Allman, Dickey Betts, Berry Oakley, Butch Trucks and Jai Johanny Johanson. 
The song "Whipping Post" was written by Gregg Allman and was featured on the band's debut album, "The Allman Brothers Band". The song is known for its powerful guitar riffs and emotional lyrics. 

The Fillmore East concert was a pivotal moment for the band, as it showcased their unique blend of blues, rock and jazz. The concert was recorded and released as a live album, "At Fillmore East", which is considered one of the greatest live albums of all time. The Allman Brothers Band's performance of "Whipping Post" at the Fillmore East remains a legendary moment in rock history.