Allah's Messenger (ﷺ) said, "The wala is for the one who gives the silver (pays the price) and does the favor (of manumission after paying the price).
Sahih al-Bukhari Book 85, Hadith 37
← Previous Hadith When Aisha intended to buy Barira, she said to the Prophet, "Barira's masters stipulated that they will have the Wala." The Prophet (ﷺ) said (to Aisha), "Buy her, as the Wala is for the one who manumits."

Sahih al-Bukhari Book 85, Hadith 36 Next Hadith → The Prophet (ﷺ) said, "The freed slave belongs to the people who have freed him," or said something similar.

Sahih al-Bukhari Book 85, Hadith 38