Talking in a dream about what should be kept secret is a sign of squandering wealth or casting wisdom before those unworthy of it. If in the dream he speaks of God the Exalted's blessings upon him, it is a sign of gratitude to God and of devotion to praising Him for what He has bestowed.
Dream meaning · al-Nabulsi
Talking (telling) تحدث
Source: al-Nabulsi, Ta'tir al-Anam fi Ta'bir al-Manam, p. 45. English translation by iDreamBot. Quran verses: Quran.com, Saheeh International.