It is narrated from Sayyidah Fatimah (may Allah be pleased with her) that she asked the Prophet (peace and blessings be upon him): "Where is our mother, Sayyidah Khadijah (may Allah be pleased with her)?" He (peace and blessings be upon him) said: "She is in a (many-chambered) palace of pearls in which there is neither clamour nor fatigue, between Sayyidah Maryam and Sayyidah Asiyah, the wife of Pharaoh." She said: "Is it made of this (worldly) reed?" He (peace and blessings be upon him) said: "No, rather it is made of reed-like pearls studded with jewels, pearls and rubies."
This hadith is narrated from Sayyidah Fatimah (may Allah be pleased with her) only with this chain; Safwan (may Allah have mercy on him) is alone in narrating it.
Hadith Referenceالمعجم الأوسط / باب الألف / 440
Hadith Gradingمحدثین:إسناده ضعيف، فيه مهاجر بن ميمون لم يُعرف ولا يُظن سماعه منها
Hadith Takhrij«قال الهيثمي: روي من طريق مهاجر بن ميمون عنها ولم أعرفه ولا أظنه سمع منها وبقية رجاله ثقات «مجمع الزوائد ومنبع الفوائد، ج 9، ص 223»»