He later recorded "Forty Days and Forty Nights" for the 1969 Fathers and Sons album and the Authorized Bootleg: Live at the Fillmore Auditorium November 4–6, 1966 album released in 2009.
In 1969, he included "Forty Days and Forty Nights" on both the Fathers and Sons album and the authorized bootleg of his live performances at the Fillmore Auditorium from November 4 to 6, 1966. This collection was later released in 2009.