Berean Study Bible
One day while Zechariah’s division was on duty and he was serving as priest before God,

King James Bible
And it came to pass, that while he executed the priest's office before God in the order of his course,

American Standard Version
Now it came to pass, while he executed the priest's office before God in the order of his course,

Darby Bible Translation
And it came to pass, as he fulfilled his priestly service before God in the order of his course,

Douay-Rheims Bible
And it came to pass, when he executed the priestly function in the order of his course before God,

English Revised Version
Now it came to pass, while he executed the priest's office before God in the order of his course,

Young's Literal Translation
And it came to pass, in his acting as priest, in the order of his course before God,