It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) was asked about Sayyidah Khadijah (may Allah be pleased with her), because she had passed away before the obligations and legal rulings had been fully laid down, and he (peace and blessings be upon him) said: "I saw her on the bank of one of the rivers of Paradise, in a palace made of pearls, in which there is neither noise nor any grief or fatigue."
The chain of this hadith contains the narrator Mujalid bin Sa'id, who is da'if (weak); however, the glad tidings of a house in Paradise for Khadijah (may Allah be pleased with her) are narrated in Sahih al-Bukhari and Sahih Muslim through other reliable chains.
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب المناقب / 4096
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :—. » «أخرجه مجمع الزوائد ومنبع الفوائد برقم: 16176، 16177، وأخرجه إتحاف الخيرة المهرة بزوائد المسانيد العشرة برقم: 6779، 6915»