Jibril giving good news of the Garden to Khadija
Al-Bukhari transmitted that Abu Hurayra, may Allah be pleased with him, said, "Jibril came to the Prophet, may Allah bless him and grant him peace, and said:
O Messenger of Allah, this is Khadija who is bringing with her a vessel containing condiments or food and drink. When she comes to you, greet her from her Lord and from. me, and give her the good news of a house in the Garden made from a hollow pearl in which there will never be any shouting or tiredness."""
At-Tabarani transmitted in al-Awsat from the hadith of Fatima, may Allah be pleased with her, who said, "I said "Messenger of Allah, where is my mother, Khadija?" He said, "In a house made of a hollow pearl. I said, 'Where is this pearl?" He said, "It is not like the kind of pearls which are strung as pearls and rubies."""
As-Suhayli said, "The purpose of using the word qasab for pearl and not the word lu'lu', is that there is an aptness in the word qasab since she, may Allah be pleased with her, carried the day 'ahrazat qasab as-sabq by hastening to belief before anyone else." He also said, "The mention of the house has a subtle meaning because she was the mistress of a house before the mission and then became the mistress of a house in Islam when there was no other house than hers, for there was no house of Islam on the face of the earth on the day when the Prophet, may Allah bless him and grant him peace, was first sent except her house. It is a virtue which no one but she shares." Ibn Hajar said, "There is another meaning in the mention of the house because the people of the Hosue of the Prophet, may Allah bless him and grant him peace, derive from it."
In the words, "any shouting or tiredness," sakhab means shout- ing and argumentation in which voices are raised, and nasab means exhaustion. As-Suhayli said that these two qualities, ie. argumentation and fatigue, are apt because when the Prophet, may Allah bless him and grant him peace, called people to Islam, Khadija, may Allah be pleased with her, answered him willingly and did not make him need to raise his voice nor quarrel nor tire in doing it. On the contrary she removed every fatigue from him and comforted him in every desolation and made every difficulty easy for him. Therefore it is fitting that the place which she was given the good news of by her Lord should have attributes corresponding to her actions.
After his words, "Greet her from her Lord and from me," at- Tabarani adds in this transmision that she said "He is Peace and Peace is from Him and peace be upon Jibril." In the variant of an- Nasa'i, she said, "Allah is Peace, and peace be upon Jibril and on you, O Messenger of Allah, be the peace and mercy of Allah and
His blessings."
Scholars say that this story contains an indication of Khadija's superior understanding because she did not say, "And upon you be peace," as was the case with some of the Companions when they used to say in the tashahhud, "Peace be upon Allah." The Prophet, may Allah bless him and grant him peace, forbade them saying, "Allah is Peace, so say: 'Greetings belong to Allah."" Thus Khadija, by the soundness of her understanding, knew that Allah does not have the word "peace" in the reply to Him as creatures do because Peace (Salam) is one of the names of Allah, and he also is called Salama, and neither of them are correct to use in replying to Allah.