From Sirach 6:
[5] A kindly turn of speech attracts new friends, a courteous tongue invites many a friendly response.
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[14] A loyal friend is a powerful defence: whoever finds one has indeed found a treasure.
[15] A loyal friend is something beyond price, there is no measuring his worth.
[16] A loyal friend is the elixir of life, and those who fear the Lord will find one.
[17] Whoever fears the Lord makes true friends, for as a person is, so is his friend too.