The Book of Sirach (/ˈsaɪræk/, Hebrew: ספר בן-סירא, romanized: Sēper ben-Sîrāʾ), also known as The Wisdom of Jesus the Son of Sirach or Ecclesiasticus (/ɪˌkliːziˈæstɪkəs/, and abbreviated Ecclus.), is a Jewish work, originally written in Biblical Hebrew.[1]
See also 'The Book of the All-Virtuous Wisdom of Joshua ben Sira[2]'.
TRUE FRIENDSHIP
¶ Pleasant speech multiplies friends, and gracious lips, friendly greetings. [Sirach 6,5]
¶ Another is a friend who turns into an enemy, and tells of the quarrel to your disgrace. [Sirach 6,9]
See also 'The Book of the All-Virtuous Wisdom of Joshua ben Sira[2]'.
[1] https://en.wikipedia.org/wiki/Book_of_Sirach
[2] https://thatgul.blogspot.com/2013/01/sirach.html