53-5-3. Unlawfulness of object and impossibility of performance renders contract void.
Where a contract has but a single object and such object is unlawful in whole or in part, or wholly impossible of performance, or so vaguely expressed as to be wholly unascertainable, the entire contract is void.
Source: CivC 1877, §904; CL 1887, §3528; RCivC 1903, §1222; RC 1919, §837; SDC 1939, §10.0403.