Hadithcore
Hadith #2117280

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.”

وَلِأَبِي دَاوُدَ: مِنْ حَدِيثِ كَعْبِ بْنِ مُرَّةَ: { "وَأَيُّمَا اِمْرَأَةٍ أَعْتَقَتْ اِمْرَأَةً مُسْلِمَةً, كَانَتْ فِكَاكَهَا مِنْ اَلنَّارِ } [1]‏ .‏

References2 variants
Sunnah.com reference
Book 15, Hadith 3
Arabic/English book reference
Book 15, Hadith 1464