He's a sleepy little man

He's a sleepy little man, I'ma love him all I can.

My grandma used to sing this to my dad, uncle, and cousins. Now she sings it to my brother. But I don't think she knows all the words because after the first sentence, she just hums. I want to be able to sing the whole song to my brother and to my friend's son when I babysit. But I'm not sure if its even an actual lullaby.