Proverbs 4:5

4:5 Acquire wisdom, acquire understanding;

do not forget and do not turn aside from the words I speak.

Proverbs 23:9

23:9 Do not speak in the ears of a fool,

for he will despise the wisdom of your words.

Proverbs 31:8

31:8 Open your mouth on behalf of those unable to speak,

for the legal rights of all the dying.