Abu Dawud transmitted on the authority of Ka'b bin Murrah (RAA), "The Messenger of Allah (ﷺ) said:
"Any Muslim woman, who emancipates another Muslim woman, she will be her release from Hell Fire." (JA)
English reference (JA): Book 15, Hadith 1464 (JA)
Arabic reference (JA): Book 15, Hadith 1420 (JA)