The Forearms
Scholars have said that a man seeing a woman with bare forearms in a dream may symbolize worldly life. Furthermore, pain in the forearm might indicate sadness or disruption in manual work, while an open palm signifies abundance in livelihood, and a clenched palm indicates scarcity. It was also mentioned that the fingers of the right hand could symbolize the five daily prayers; their shortness indicates negligence in them, and their length indicates adherence to them.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam