Luke 22:6

Judas accepted the bargain, and sought an opportunity to secure him, without alarming the people.

Matthew 26:5

but they said, this must not be done on the feastday, for fear the people rise.

Mark 14:2

but they objected, it could not be during the festival, for fear of a popular insurrection.

Treasury of Scripture Knowledge

Summary

And he promised, and sought opportunity to betray him unto them in the absence of the multitude.

In the absence of the multitude

Bible References

In the absence of the multitude

Matthew 26:5
but they said, this must not be done on the feastday, for fear the people rise.
Mark 14:2
but they objected, it could not be during the festival, for fear of a popular insurrection.