Specimens of Bushman Folklore, by W.H.I. Bleek and L.C. Lloyd, [1911], at sacred-texts.com
THE SONG OF THE SPRINGBOK MOTHERS.
The Springbok mothers sang (soothing their children)--
"A-a' hng
O Springbok Child!
sleep for me.
A-a' hng
O Springbok Child!
Sleep for me."