Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
Jealousy in a dream indicates keenness on religion and worldly life. A man's jealousy over his wife indicates his love and protection for her. A woman's jealousy indicates corruption in her religion.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
Jealousy indicates love. It may also indicate falling into strife because of women. The jealousy of a ruler indicates his justice and protection of his subjects.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
Jealousy is interpreted as keenness on what one possesses. Praiseworthy jealousy is righteousness in religion, and blameworthy jealousy is corruption and obsessive suspicion.