Sayyiduna Shuraid (may Allah be pleased with him) said: I presented myself before the Prophet (peace and blessings be upon him) and said that my mother (lady) has to offer expiation for freeing a slave, and I have a black Abyssinian slave-girl; will she suffice? The Prophet (peace and blessings be upon him) said: "Bring her to me." When she came, the Prophet (peace and blessings be upon him) said: "Do you testify to «لا إله إلا اللّٰھ»?" She said: Yes. He said: "Go, set her free, for she is a believer."
Hadith Referenceسنن دارمي / من النذور و الايمان / 2385
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده حسن من أجل محمد بن عمرو، [مكتبه الشامله نمبر: 2393]
Hadith Takhrijاس حدیث کی سند حسن ہے۔ دیکھئے: [ابن حبان 189] ، [موارد الظمآن 1207]