Cutting Someone's Finger
Scholars have said that seeing someone's finger cut off in a dream might indicate the dreamer experiencing a financial misfortune. It was also said that the loss of fingers symbolizes losing servants, and chewing fingers indicates loss of wealth. Contracting fingers is interpreted as abandoning forbidden acts, while afflictions to fingernails suggest a weakening of ability and corruption in religious and worldly matters, and long fingernails might symbolize sorrow.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam