אִ֣ישׁ רֵ֭עִים לְהִתְרֹעֵ֑עַ וְיֵ֥שׁ אֹ֝הֵ֗ב דָּבֵ֥ק מֵאָֽח׃
There are friends that one hath to his own hurt; But there is a friend that sticketh closer than a brother.
Read halakhic rulings (Jewish law) on Proverbs 18:24: and classical halakhic sources.