Definition and Context:
In biblical terms, a "gift to the LORD of Hosts" refers to offerings, sacrifices, or contributions made to God, who is often referred to as the "LORD of Hosts" in the Hebrew Bible. This title emphasizes God's sovereignty and command over the heavenly armies. Gifts to the LORD were integral to the worship practices of the Israelites and were seen as expressions of devotion, gratitude, and obedience.

Biblical References:
The concept of giving gifts to the LORD is prevalent throughout the Old Testament. These gifts could take various forms, including animal sacrifices, grain offerings, and other contributions to the temple or tabernacle.

1. Animal Sacrifices:
Animal sacrifices were a primary form of gift to the LORD. Leviticus 1:2-3 states, "Speak to the Israelites and tell them, ‘When any of you brings an offering to the LORD, you may bring as your offering an animal from the herd or the flock. If his offering is a burnt offering from the herd, he is to present an unblemished male. He must bring it to the entrance to the Tent of Meeting for acceptance on his behalf before the LORD."

2. Grain Offerings:
Grain offerings were another form of gift, often accompanying animal sacrifices. Leviticus 2:1 describes, "When anyone presents an offering of grain to the LORD, his offering shall consist of fine flour. He is to pour olive oil on it, put frankincense on it."

3. Tithes and Contributions:
Tithes and other contributions were also considered gifts to the LORD. Malachi 3:10 exhorts, "Bring the full tithe into the storehouse, so that there may be food in My house. Test Me in this,’ says the LORD of Hosts, ‘and see if I will not open the windows of heaven and pour out for you blessing without measure."

4. Vows and Freewill Offerings:
In addition to prescribed offerings, individuals could make vows or freewill offerings. Deuteronomy 23:21 advises, "If you make a vow to the LORD your God, do not be slow to keep it, because He will surely require it of you, and you will be guilty of sin."

Theological Significance:
Gifts to the LORD of Hosts were not merely ritualistic but carried deep theological significance. They symbolized the worshiper's acknowledgment of God's holiness, sovereignty, and provision. The act of giving was a tangible expression of faith and trust in God’s covenant promises.

Prophetic and Messianic Implications:
The prophets often critiqued the Israelites for offering gifts without genuine repentance or faith. Isaiah 1:11 declares, "What is your multitude of sacrifices to Me?’ says the LORD. ‘I am full of burnt offerings of rams and the fat of well-fed cattle; I have no delight in the blood of bulls and lambs and goats." This highlights the importance of the heart's posture over the mere act of giving.

In the New Testament, the ultimate gift to the LORD is seen in the person of Jesus Christ, who offered Himself as a perfect sacrifice. Hebrews 10:10 states, "And by that will, we have been sanctified through the sacrifice of the body of Jesus Christ once for all."

Cultural and Historical Context:
In ancient Israel, gifts to the LORD were central to religious life and community identity. The tabernacle and later the temple served as focal points for these offerings. The practice underscored the communal and individual responsibility to honor God through material and spiritual means.

Practical Application:
For contemporary believers, the principle of giving to the LORD continues through acts of worship, service, and stewardship. While the form of gifts may differ, the underlying intent remains to honor God with one's resources and life.