The raising of
Lazarus had
caused the
fame of
Jesus to
spread all
around
Jerusalem,
to the

point where the rulers were becoming alarmed.
Something had to be done about it and soon.

The Sanhedrin decreed death to Him; and
because the miracle of raising Lazarus from
the dead had caused so much attention the
rulers thought to put Lazarus to death also.

They just waited for a good time to do it.