Here's the version from Belden:

MOSES IN THE BULRUSHES

By the side of a river so clear
They carried the beautiful child;
Mid the flags and the bushes in an ark of bulrushes
They left him so lonely and wild;
For the ruffians would come if he tarried at home
And murder that infant so dear.

By the side of the river so clear
The ladies were winding their way,
When Pharaoh's daughter stepped down to the water
To bathe at the close of the day.
Before it was dark, she opened the ark
And found a sweet infant was there.

By the side of the river so clear
That infant was lonely and sad.
She took him in pity and thought him so pretty
And made little Moses so glad.
She called him her own, her beautiful son,
And sent for a nurse that was near.

Away from the river so clear
They carried the beautiful child
To his own tender mother, his sister and brother,
And then he looked happy and smiled.
His mother so good did all that she could
To nurse him and teach him with care.

Notes: Another biblical narrative, which I have found reported elsewhere only from Tennessee (SFSEA 55-6). Miss Lowry's text covers only the first half of the song reported by Jackson.

'By the Side of a River.' Reported by Miss Lowry in 1905 as known by her aunt in Indiana.

From H. M. Belden, Ballads and Songs Collected by the Missouri Folk-Lore Society (University of Missouri Press, 1940, 1955, p. 449; without tune)