Shared ground
These verses show Aaron acting as the community’s priest by presenting offerings that belong to “the people,” not to himself (explicit). The order matters: the people’s sin offering is handled first, then the burnt offering, then the grain offering (explicit). The narrative emphasizes procedure rather than giving new instructions; “according to the ordinance” assumes the earlier directions for each offering (explicit).
The text also shows that special, one-time sacrifices do not cancel the regular rhythm of worship. The grain offering here is added “besides” the morning burnt offering, implying an already-established daily schedule that continues even on a major day like this (explicit).
Where interpretation differs
What “as the first” refers to. Some take it to mean “first among the people’s offerings” (sin offering comes before burnt and grain). Others understand it more broadly as “first in the whole day’s sacrificial sequence,” contrasting the people’s sin offering with the earlier sin offering Aaron already offered for himself (vv. 8–14). The verse itself points to sequence but does not spell out the full comparison (inference built from context).
What “according to the ordinance” is pointing back to. Many read it as a simple reference to the already-given rules in Leviticus 1–7 (so the narrator does not repeat details). Others think it may also highlight that this first public performance is carefully done “by the book,” stressing legitimacy and continuity, not improvisation (both are compatible; the difference is emphasis).
Why the disagreement exists
The passage uses shorthand phrases that assume the reader knows earlier instructions (“according to the ordinance”) and earlier events in the chapter (“as the first”). Because those phrases are brief, readers differ on how far the reference reaches: only within vv. 15–17, or back to the earlier sacrifices in vv. 8–14 and to the instruction material in chapters 1–7.
What this passage clearly contributes
It presents a basic pattern for communal approach to God at the start of Israel’s priestly service: sin offering first, then whole-offering worship (burnt offering), then a tribute/gift expressed in grain (explicit sequence). It also underlines that Israel’s worship has both special moments and daily continuity—the additional grain offering does not replace the morning burnt offering (explicit). Aaron’s role is mediating and procedural: he “presents” what the people bring and performs the offerings as instructed (explicit), setting the tone for priestly ministry in the tabernacle (inference from placement in Leviticus 9).