It is narrated from Sayyiduna Abu Tha'labah al-Khushani (may Allah be pleased with him) that he said: Whenever the Messenger of Allah (peace and blessings be upon him) returned from a military expedition or a journey, he would first enter the mosque and pray two rak'ahs, then go to Sayyidah Fatimah (may Allah be pleased with her), and after that go to his pure wives. Once, when he (peace and blessings be upon him) returned and came out of the mosque, Sayyidah Fatimah (may Allah be pleased with her) met him at the door of the house; she began kissing his blessed mouth and his eyes, and weeping. He (peace and blessings be upon him) asked her: "O my daughter, what makes you weep?" She said: O Messenger of Allah (peace and blessings be upon him), I see you dishevelled and exhausted, and your clothes have become worn out. He (peace and blessings be upon him) said: "Then do not weep, for Allah, the Mighty and Majestic, has sent your father with a matter (the religion) that will not leave a single house of clay or tent of hair on the face of the earth without Allah bringing into it honour (through Islam) or humiliation (through disbelief), until this religion reaches wherever the night reaches." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.