You must redeem the firstborn of a donkey with a lamb; but if you do not redeem it, you are to break its neck. You must redeem all the firstborn of your sons. No one shall appear before Me empty-handed.
Jewish Publication Society of America Version (JPS1917) - Exodus 34:20 >And the firstling of an ass thou shalt redeem with a lamb; and if thou wilt not redeem it, then thou shalt break its neck. All the first-born of thy sons thou shalt redeem. And none shall appear before Me empty.