Rock a bye

Rock-a-bye Rock-a-bye oh, baby, oh. Rock-a-bye Rock-a-bye quickly you'll grow. Things less important will just have to keep, while I Rock-a-bye my baby to sleep.

My mom used to play this song for me abs eventually sang it to me every night. I have a 10 month old son and have been searching for the name of the cassette or cd. If anyone knows PLEASE help me :)