14 The text uses a cognate accusative (“incense”) with the verb “to burn” or “to make into incense/sweet smoke.” Then, the noun “sweet spices” is added in apposition to clarify the incense as sweet.
15 The Hebrew is בְּהֵיטִיבוֹ (béhetivo), a Hiphil infinitive construct serving in a temporal clause. The Hebrew verb means “to make good” and so in this context “to fix” or “to dress.” This refers to cleansing and trimming the lamps.
16 The point of the little golden altar of incense is normally for intercessory prayer, and then at the Day of Atonement for blood applied atonement. The instructions for making it show that God wanted his people to make a place for prayer. The instructions for its use show that God expects that the requests of his people will be pleasing to him.

In other versions

And Aaron shall burn fragrant incense on it. Every morning when he dresses the lamps he shall burn it,

“Aaron must burn fragrant incense on the altar every morning when he tends the lamps.

Aaron must burn fragrant incense on it; he must burn it every morning when he tends the lamps.

“Every morning when Aaron maintains the lamps, he must burn fragrant incense on the altar.

“And on it Aaron will turn fragrant incense into smoke; each morning when he tends the lamps, he will turn it into smoke.

And Aaron shall burn thereon sweet incense every morning: when he dresseth the lamps, he shall burn incense upon it.

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