Is Jeremiah 2:3 an allusion to Leviticus 19:23?
In short to your question the answer is: NO
Jeremiah 2:2-3 (NASB)
2 “Go and proclaim in the ears of Jerusalem, saying, ‘Thus says the
Lord, “I remember concerning you the [a]devotion of your youth, The
love of your betrothals, Your following after Me in the wilderness,
Through a land not sown. 3 “Israel was holy to the Lord,The first of
His harvest. All who ate of it became guilty; Evil came upon them,”
declares the Lord.’"
" The love of your betrothals," As a loving Husband, God cared for his people. Through his prophet Jeremiah, he reminded them of what their relationship was at first,(when they came out of Egypt) saying: “(Vs 2)
2 “Go [Jeremiah] and proclaim in the ears of Jerusalem, saying, ‘Thus
says the Lord, “I remember concerning you the [a]devotion of your
youth, The love of your betrothals, Your following after Me in the
wilderness, Through a land not sown."
Israel (the nation)was something holy to God the first fruits of his harvest, anyone who ate it became guilty. (Vs 3) For example, when the Amalekites launched an unprovoked attack against Israel, under the command of Joshua God gave the Israelites a crushing victory over the Amalekites:
Exodus 17:8-13 (NASB)
Victory over the Amalekites.
8"Then Amalek came and fought against Israel at Rephidim. 9 So Moses
said to Joshua, “Choose men for us and go out, fight against Amalek.
Tomorrow I will station myself on the top of the hill with the staff
of God in my hand.” 10 Joshua did as Moses [a]told him, [b]and fought
against Amalek; and Moses, Aaron, and Hur went up to the top of the
hill. 11 So it came about when Moses held his hand up, that Israel
prevailed, and when he let his hand [c]down, Amalek prevailed. 12 But
Moses’ hands were heavy. Then they took a stone and put it under him,
and he sat on it; and Aaron and Hur supported his hands, one on one
side and one on the other. Thus his hands were steady until the
sunset. 13 So Joshua [d]overwhelmed Amalek and his people with the
edge of the sword."
Leviticus 19:23-25 (NASB)
Firstfruits, and Care for Poor. The firstfruits of each harvest were to be presented to God. (Leviticus 23:10, 11; Deuteronomy 26:1-4) The fruit of a tree was not to be gathered for personal use until its fifth year. (Leviticus 19:23-25.)
Leviticus 19:23-25 (NASB)
23 ‘When you enter the land and plant all kinds of trees for food,
then you shall count their fruit as [a]forbidden. Three years it shall
be [b]forbidden to you; it shall not be eaten. 24 But in the fourth
year, all its fruit shall be holy, an offering of praise to the Lord.
25 In the fifth year, you are to eat of its fruit, that its yield may
increase for you; I am the Lord your God.