Leviticus 22:18-21

22:18 “Speak to Aaron, his sons, and all the Israelites and tell them, ‘When any man from the house of Israel or from the foreigners in Israel presents his offering for any of the votive or freewill offerings which they present to the Lord as a burnt offering, 22:19 if it is to be acceptable for your benefit it must be a flawless male from the cattle, sheep, or goats. 22:20 You must not present anything that has a flaw, because it will not be acceptable for your benefit. 22:21 If a man presents a peace offering sacrifice to the Lord for a special votive offering or for a freewill offering from the herd or the flock, it must be flawless to be acceptable; it must have no flaw.

Deuteronomy 12:6-7

12:6 And there you must take your burnt offerings, your sacrifices, your tithes, the personal offerings you have prepared, your votive offerings, your freewill offerings, and the firstborn of your herds and flocks. 12:7 Both you and your families must feast there before the Lord your God and rejoice in all the output of your labor with which he has blessed you.

Matthew 6:2

6:2 Thus whenever you do charitable giving, do not blow a trumpet before you, as the hypocrites do in synagogues and on streets so that people will praise them. I tell you the truth, they have their reward.