'During' in the Bible

Nadab and Abihu died {before Yahweh} when they presented a strange fire {before Yahweh} in the desert of Sinai, and {they had no children}. Eleazar and Ithamar served as priest during the presence of Aaron their father.

Then all the community {lifted up their voices}, and the people wept during that night.

" 'And on the day of firstfruits, when you are presenting a new offering for Yahweh during your Festival of Weeks, you will have a holy convocation; {you will not do any regular work}.