If in a dream it is accompanied by screaming, slapping one's face, weeping or tearing the neckline of one's garment, it may indicate that very thing (real mourning). If the weeping is out of fear of God Almighty, or from hearing the Quran, or from remorse over a sin, then in a dream it is a sign of relief, joy and the departure of worries and miseries; it indicates reverent fear (of God), and it indicates rainfall for one from whom it has been withheld and who needs it.
Dream meaning · al-Nabulsi
Weeping (crying) بكاء
Source: al-Nabulsi, Ta'tir al-Anam fi Ta'bir al-Manam, p. 25. English translation by iDreamBot. Quran verses: Quran.com, Saheeh International.