Sirach 6:4-6

New Revised Standard Version, Anglicised

⁴ Evil passion destroys those who have it,
    and makes them the laughing-stock of their enemies.

⁵ Pleasant speech multiplies friends,
    and a gracious tongue multiplies courtesies.
⁶ Let those who are friendly with you be many,
    but let your advisers be one in a thousand.