speak with one voice

to express the same opinion It is a very rare event when my family speaks with one voice about anything.

Usage notes: must refer to two or more people, as in the example

Name	Pronounced	Usage
Murchadh	-	Irish, Scottish
Emanuel	[i'mænjuəl]
Mykhaylo	-	Ukrainian
JÓNatan	-	Icelandic
Benigna	-	Spanish, Italian, Portuguese, Late Roman
Mindy	MIN-dee	English