Matthew Poole and continuators on Leviticus 19:5

5 And if he offer a sacrifice of peace-offerings unto the LORD, ye shall offer it at your own will .

Or, according to your own good pleasure, what you think fit: For though this in the general was required, yet it was left to their choice to determine the particulars. See Levit. 7. 16. Or rather, to your acceptation, i. e. in such manner as it may be accepted by God on your behalf, which is explained in the next verse, and not in such manner as to lose the end you aim at▪ to wit, Gods acceptance: for if ve do otherwise than God hath prescribed, it shall not be accepted, as he addes ver. 7. but on the contrary severely punished, ver. 8.