And the other lamb thou shalt offer at even,.... See Gill on Exodus 29:39,

and shall do thereto according to the meat offering of the morning, and according to the drink offering thereof; a meat and drink offering consisting of the same things, for quality and quantity, and made in the same manner, were to be offered with the daily evening sacrifice, as with the morning one:

for a sweet savour, an offering made by fire unto the Lord: for these lambs were both burnt with fire upon the altar, and therefore are called a burnt offering in the next verse.

להּ is to be understood ad sensum as referring to עולה. The daily morning and evening sacrifices were to be "for a sweet savour, a firing unto Jehovah" (see at Leviticus 1:9). In these Israel was to consecrate its life daily unto the Lord (see at Leviticus 1 and 2). In order that the whole of the daily life might be included, it was to be offered continually every morning and evening for all future time ("throughout your generations" as at Exodus 12:14) at the door of the tabernacle, i.e., upon the altar erected there, before Jehovah, who would meet with the people and commune with them there (see Exodus 25:22). This promise is carried out still further in Exodus 29:43-46. First of all, for the purpose of elucidating and strengthening the words, "I will meet with you there" (Exodus 29:42), the presence and communion of God, which are attached to the ark of the covenant in Exodus 25:22, are ensured to the whole nation in the words, "And there I will meet with the children of Israel, and it (Israel) shall be sanctified through My glory." As the people were not allowed to approach the ark of the covenant, but only to draw near to the altar of burnt-offering in the sanctuary, it was important to declare that the Lord would manifest Himself to them even there, and sanctify them by His glory. Most of the commentators have taken the altar to be the subject of "shall be sanctified;" but this is certainly an error, not only because the altar is not mentioned in the previous clause, and only slightly hinted at in the להּ in Exodus 29:41, but principally because the sanctification of the altar is noticed by itself afterwards in Exodus 29:44. The correct exegesis is that adopted by Baumgarten and others, who supply the word Israel (viz., regarded as a nation), which they take from the expression "children of Israel" in the previous clause. In Exodus 29:44, the sanctification of the tabernacle and altar on the part of God is promised, also that of His servants, and finally, in Exodus 29:45, Exodus 29:46, the abode of God in the midst of the children of Israel, with an allusion to the blessings that would follow from Jehovah's dwelling in the midst of them as their God (Genesis 17:7).

And the other lamb thou shalt offer at even, and shalt do thereto according to the meat offering of the morning, and according to the drink offering thereof, for a sweet savor, an offering made by fire unto the LORD.

29:38-46 A lamb was to be offered upon the altar every morning, and a lamb every evening. This typified the continual intercession which Christ ever lives to make for his church. Though he offered himself but once for all, that one offering thus becomes a continual offering. This also teaches us to offer to God the spiritual sacrifices of prayer and praise every day, morning and evening. Our daily devotions are the most needful of our daily works, and the most pleasant of our daily comforts. Prayer-time must be kept up as duly as meal-time. Those starve their own souls, who keep not up constant attendance on the throne of grace; constancy in religion brings in the comfort of it.