The Peak of Eloquence · Hadith 1848 (#Passage #207)

١٦٢. وَقَالَ (عليه السلام): مَنْ كَتَمَ سِرَّهُ كَانَتِ الْخِيرَةُ بِيَدِهِ.

162. Amīr al-mu’minīn, peace be upon him, said: He who guards his secrets retains control in his own hands.

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).