He then said, "O Ka'b bin Murrah! Narrate to us a hadith of the Prophet (peace be upon him) with caution." He replied, "I heard the Prophet (peace be upon him) say: Whoever frees a Muslim, it becomes a means of deliverance for him from Hell, and for every limb of the slave, a limb of the one who frees him is set free. And whoever frees two Muslim women, both of them become a means of deliverance for him from Hell, and for every limb of theirs, a limb of the one who frees them is set free from Hell. And whoever grows old in the way of Allah, the whiteness of his hair will be a source of light for him on the Day of Resurrection."
Hadith Referenceمسند احمد / مسند الشاميين / 18064
Hadith Gradingحکم دارالسلام:صحيح لغيره دون قوله: ومن أعتق امرأتين مسلمتين…..، وهذا إسناد ضعيف لانقطاعه، سالم لم يسمع من شرحبيل