(Whoever sees) in a dream that a will is being entrusted to him, it indicates six things: that what he is told is true, or a matter will be delegated to him, or an exaltation of his standing, or an increase in knowledge, or that forty years of his life have passed, or honor and protection from God Most High.
Dream meaning · al-Nabulsi
Executor (being named executor) وصى
Source: al-Nabulsi, Ta'tir al-Anam fi Ta'bir al-Manam, p. 364. English translation by iDreamBot. Quran verses: Quran.com, Saheeh International.