It is narrated from Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said to Abu Talhah (may Allah be pleased with him): "Find me one of your boys to serve me until I go out to Khaybar." So Abu Talhah (may Allah be pleased with him) took me, riding behind him on his mount, and I was a boy close to puberty. I used to serve the Messenger of Allah (peace and blessings be upon him) whenever he (peace and blessings be upon him) stopped, and I often heard him (peace and blessings be upon him) say this supplication: 'Allahumma inni a'udhu bika min al-hammi wal-hazan, wal-'ajzi wal-kasal, wal-bukhli wal-jubn, wa dala'i al-dayn, wa ghalabat al-rijal' (O Allah, I seek refuge in You from grief and helplessness, from laziness, miserliness and cowardice, from the burden of debt and from being overpowered by oppressors).
Then we came to Khaybar. When Allah Almighty granted him (peace and blessings be upon him) victory over the fortress, the beauty of Safiyyah bint Huyayy (may Allah be pleased with her) was mentioned to him; her husband had been killed, and she was a new bride. The Messenger of Allah (peace and blessings be upon him) chose her for himself. He (peace and blessings be upon him) set off with her until, when we reached al-Sahba', she became pure from her menses, and he (peace and blessings be upon him) consummated the marriage with her. After that he (peace and blessings be upon him) had hays (a sweet dish) prepared and placed on a small leather mat, and he ordered me to invite the people around me; that was the wedding feast (walimah) of the Messenger of Allah (peace and blessings be upon him) for his marriage to Safiyyah (may Allah be pleased with her). Then we set out for Madinah, and I saw that the Messenger of Allah (peace and blessings be upon him) had made a screen with his cloak behind him for the sake of Safiyyah (may Allah be pleased with her). When Safiyyah (may Allah be pleased with her) was about to mount, he (peace and blessings be upon him) would sit beside his camel and raise his knee, and Safiyyah (may Allah be pleased with her) would put her foot on the knee of the Messenger of Allah (peace and blessings be upon him) and mount. We travelled on like this, and when we came near Madinah, he (peace and blessings be upon him) looked at the mountain of Uhud and said: "This is a mountain that loves us and we love it." Then he (peace and blessings be upon him) looked towards Madinah and said: "O Allah! I declare sacred the area between its two lava plains, just as Ibrahim declared Makkah sacred. O Allah! Bless the people of Madinah in their mudd and their sa' (measures)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 12755