People too poor to present such an offering select wood that will not rot. They look for a skilled worker to set up an idol that will not topple.
NIV
He who is so impoverished that he has no offering or oblation or rich gift to give [to his god is constrained to make a wooden offering, an idol; so he] chooses a tree that will not rot; he seeks out a skillful craftsman to carve and set up an image that will not totter or deteriorate.
AMP
He that is so impoverished that he hath no oblation chooseth a tree that will not rot; he seeketh unto him a cunning workman to prepare a graven image, that shall not be moved.
KJV
If what they vowed is a ceremonially unclean animal – one that is not acceptable as an offering to the LORD – the animal must be presented to the priest
NIV
If it is an unclean animal, such as is not offered as an offering to the Lord, he shall bring the animal before the priest
AMP
And if it be any unclean beast, of which they do not offer a sacrifice unto the LORD, then he shall present the beast before the priest:
KJV
"But you must not redeem the firstborn of a cow, a sheep or a goat; they are holy. Splash their blood against the altar and burn their fat as a food offering, an aroma pleasing to the LORD."
NIV
But the firstling of a cow or of a sheep or of a goat you shall not redeem. They [as the firstborn of clean beasts belong to God and] are holy. You shall sprinkle their blood upon the altar and shall burn their fat for an offering made by fire, for a sweet and soothing odor to the Lord.
AMP
But the firstling of a cow, or the firstling of a sheep, or the firstling of a goat, thou shalt not redeem; they are holy: thou shalt sprinkle their blood upon the altar, and shalt burn their fat for an offering made by fire, for a sweet savour unto the LORD.
KJV