Khadijah bint Khuwaylid (may Allah be pleased with her): the leading women of Paradise are four

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him); he said: Jibril (peace be upon him) came to the Prophet (peace and blessings be upon him) and said: O Messenger of Allah, here is Khadijah coming to you with a vessel containing a savoury dish, or food, or drink. When she comes to you, convey to her greetings of peace from her Lord, and give her the glad tidings of a house of pearls in Paradise in which there will be no clamour and no hardship.
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it with this wording; however, they agree on the original account of the glad tidings given to Khadijah.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both); he said: The Messenger of Allah (peace and blessings be upon him) drew four lines on the ground and said: "Do you know what this is?" The Companions said: Allah and His Messenger know best. The Messenger of Allah (peace and blessings be upon him) said: "The most excellent of the women of the people of Paradise are Khadijah bint Khuwaylid, Fatimah bint Muhammad, Maryam bint Imran, and Asiyah, the wife of Pharaoh."
This hadith has a sahih (authentic) chain of narration, but the two Shaykhs did not record it with this wording.

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that she said to Sayyidah Fatimah (may Allah be pleased with her), the daughter of the Messenger of Allah (peace and blessings be upon him): Shall I not give you glad tidings? I heard the Messenger of Allah (peace and blessings be upon him) say: "The leaders of the women of the people of Paradise are four: Maryam bint Imran, Fatimah the daughter of the Messenger of Allah, Khadijah bint Khuwaylid, and Asiyah."

It is narrated from Sayyidah Aishah (may Allah be pleased with her); she said: I did not feel as much jealousy towards any woman as I felt towards Khadijah, even though the Messenger of Allah (peace and blessings be upon him) married me after her death. That was because the Messenger of Allah (peace and blessings be upon him) had given her the glad tidings of a house of pearls in Paradise in which there will be no clamour and no toil.
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), and they did not record it.

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) did not marry any other woman while Sayyidah Khadijah was with him, until her death. Sayyidah Aishah said: I never saw Khadijah, yet I never felt as much jealousy towards any of his (peace and blessings be upon him) wives as I felt towards Khadijah, and that was because he (peace and blessings be upon him) mentioned her so often.
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), and they did not record it.