The Sharia of Moses in the TORA
Part 2 - The 365 Prohibitions of the Tora
108 - REDEEMING THE FIRSTLING OF A CLEAN BEAST
The firstling may be sold, as is explained in Tractate Bekoroth.* In the time of the Temple, it could be sold only if blemished; at present, it may be sold even in perfect condition.** Violation of this commandment does not entail whipping, since any attempt to redeem the firstling of a clean beast is invalid, and the firstling retains its original hallowed status.
** Mishneh Torah, Korbanoth, Hilchoth Bekoroth I, 17