من لا يحضره الفقيه, volume 3, page 117

Hadith.3449 - Jamil narrated from Zurarah, from Abu Ja'far Imam Muhammad ibn Ali Al-Baqir (as) and Abu Abdullah Imam Jafar ibn Muhammad Al-Sadiq (as), regarding a man who freed a slave that had wealth. The Imams (as) said: "If he knew that the slave had wealth, then the wealth belongs to the freed slave. But if he did not know, then the wealth belongs to the one who emancipated him." And regarding a man who sold a slave that had wealth, the Imams (as) said: "If the seller knew that the slave had wealth, then the wealth belongs to the buyer. But if the seller did not know, then the wealth belongs to the seller."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.

Hadith.3450 - Ibn Bukayr narrated from Zurarah, from Abu Abdullah (as), who said: "If a man has a slave and frees him, knowing that the slave has wealth, and the master did not exclude the wealth at the time of freeing him, then the wealth belongs to the slave."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.

Hadith.3451 - Abd al-Rahman ibn Abi Abdullah asked him about a man who freed his slave, and the slave had wealth. Then the man who freed the slave passed away. Abd al-Rahman asked: "To whom does the wealth of the slave belong? Does it go to the one who freed the slave, or does it belong to the slave?" Imam (as) said: "If he freed him knowing that the slave had wealth, then the wealth belongs to the slave. But if he did not know, then the wealth belongs to the children of his master."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.