All the sons of Aaron in their splendor: Good News Translation begins a new sentence here, saying “Those were….” The sons of Aaron refers to the priests. In their splendor refers to their priestly garments, “splendid garments” (Good News Translation), “beautiful robes” (Contemporary English Version).

With the Lord’s offering in their hands: The Lord’s offering refers to the offering that was being made to the Lord. For this line Good News Translation has “holding in their hands the offering made to the Lord.” Good News Translation places the line last in the verse, and many translators will find this more natural style.

Before the whole congregation of Israel: Good News Translation adds “standing” for naturalness in English. Before means they were standing in front of, or in sight of, the people, who were watching. So for this line we may say “as all the Israelites watched.”

Quoted with permission from Bullard, Roger A. and Hatton, Howard A. A Handbook on Sirach. (UBS Helps for Translators). New York: UBS, 2008. For this and other handbooks for translators see here.