80's chipmunk episode, chipmunks find their mother. Mother sings them a song. A few words of her song. "hush a bye little one“ What is the title of chipmunk show? title of song? can I buy this chipmunk show?

In the 80's there was a chipmunk episode that featured the chipmunks running away to find their mother. They do find her. It shows the chipmunks as babies and their mother sings them a song. The words I remember are... "hush a bye little one, dream sweat dream little one, dream time is near, you needn't fear and when you wake I will be there." Do you know the title of this chipmunk show? or the title of the song?, or if I can buy this chipmunk show? Thank you for any information you may have : )you can e-mail me at memoria7875@comcast.net