Biblical References:
The concept of oil for the lampstand is primarily found in the Old Testament, specifically in the books of Exodus and Leviticus. The instructions for the use of oil in the lampstand are detailed in Exodus 27:20-21 and Leviticus 24:1-4.

Exodus 27:20-21 :
"You are to command the Israelites to bring you pure oil of pressed olives for the light, to keep the lamps burning continually. In the Tent of Meeting, outside the veil that is in front of the Testimony, Aaron and his sons are to tend the lamps before the LORD from evening until morning. This is to be a perpetual statute for the Israelites throughout their generations."

Leviticus 24:1-4 :
"The LORD said to Moses, 'Command the Israelites to bring you pure oil of pressed olives for the light, to keep the lamps burning continually. Outside the veil of the Testimony in the Tent of Meeting, Aaron is to tend the lamps before the LORD from evening until morning continually. This is a permanent statute for the generations to come. He shall tend the lamps on the pure gold lampstand before the LORD continually.'"

Symbolism and Significance:
The oil for the lampstand, specifically pure oil of pressed olives, holds significant symbolic meaning in the biblical narrative. The lampstand, or menorah, was a vital element in the Tabernacle and later in the Temple, representing the presence and light of God among His people. The continual burning of the lamps signified the perpetual presence and guidance of God.

The use of pure olive oil is noteworthy. Olive oil was a valuable commodity in ancient Israel, symbolizing purity, consecration, and the Holy Spirit. The requirement for the oil to be "pure" underscores the holiness and sanctity of the worship practices in the Tabernacle. The pressing of olives to obtain the oil can also be seen as a metaphor for the process of purification and dedication required of the Israelites in their service to God.

Priestly Duties:
The responsibility of tending the lamps was given to Aaron and his sons, the priestly line. This duty was not merely a ritualistic task but a sacred service performed before the LORD. The priests were to ensure that the lamps burned from evening until morning, symbolizing the unending nature of God's light and truth. This task was a perpetual statute, emphasizing the continuous need for divine illumination and presence in the lives of the Israelites.

Theological Implications:
From a theological perspective, the oil for the lampstand can be seen as a foreshadowing of the light of Christ, who is described in the New Testament as the "light of the world" (John 8:12). The continual burning of the lamps in the presence of God prefigures the eternal light and life brought through Jesus Christ. Additionally, the oil's association with the Holy Spirit is echoed in the New Testament, where believers are called to be filled with the Spirit, maintaining the light of Christ within them.

Cultural and Historical Context:
In the cultural and historical context of ancient Israel, the lampstand and its oil were central to the worship practices in the Tabernacle. The meticulous care in preparing and maintaining the oil reflects the broader cultural emphasis on purity and dedication in worship. The lampstand itself, crafted from pure gold, was a masterpiece of artistry and devotion, symbolizing the beauty and holiness of God's presence.

The oil for the lampstand, therefore, is not merely a functional element but a profound symbol of divine presence, purity, and the enduring covenant between God and His people.