Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The cow indicates a year. A fat cow indicates a fertile year full of prosperity and goodness. A thin cow indicates a year of drought, barrenness, and hardship. Drinking cow's milk indicates wealth for the poor, health for the sick, and an increase in wealth for the rich. Being gored by a cow indicates loss or dismissal from a position.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The cow indicates a righteous woman, a trustworthy servant, or a blessed year. Whoever rides a cow will gain wealth and authority, and his worry will disappear. Whoever sees a cow speaking to him will receive great goodness that will amaze people. A black cow is a blessed lady, and a yellow one is a year with joy and goodness.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The cow is interpreted as the year. Whatever is seen in it of fatness, leanness, or color, its interpretation reflects on that year. Whoever sees that he owns many cows will gain authority and his wealth will increase. Eating cooked beef indicates lawful sustenance from a government employee.