Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
A woman's breast in a dream indicates her daughter. Milk in it is sustenance and blessing. For a man, the breast indicates worry and grief.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The breast indicates the wife or mother. Whoever sees that he has many breasts will be blessed with many children.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The breast is interpreted as wealth. Its largeness indicates abundance of wealth, and its smallness indicates its scarcity.