It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that Friday was presented to the Messenger of Allah (peace and blessings be upon him). Jibril (peace be upon him) came, and in his palm was something like a white mirror with something like a black spot in its middle. He (peace and blessings be upon him) asked: "O Jibril, what is this?" He said: "This is Friday, which your Lord is presenting to you, so that it may be a day of Eid for you and for your Ummah after you, and in it there is good for you. (In excellence over the other nations) you are first, and the Jews and the Christians come after you. And in this day there is an hour in which, if anyone asks his Lord for some good that is decreed for him, Allah will certainly grant it to him; or if he seeks refuge from some evil, Allah will avert from him something even greater than it. And we call it in the Hereafter Yawm al-Mazid (the Day of Increase). The reason for this is that your Lord has made in Paradise a very wide valley of white musk. When Friday comes, Allah Almighty descends from Illiyyin (in a manner befitting His majesty) and sits upon His Kursi, and around the Kursi are placed pulpits of gold studded with jewels; then the truthful ones (siddiqun) and the martyrs come and sit upon them; and the people of the lofty chambers come out of their chambers until they sit on the kathib (dune), and that kathib is of white, intensely fragrant musk. Then Allah Almighty manifests Himself to them and says: 'I am the One who fulfilled My promise to you and completed My favour upon you, and this is the place of My honour, so ask of Me.' They ask Him for His good pleasure, and Allah Almighty says: 'It is My good pleasure that has settled you in My abode and brought you to My honour, so ask of Me.' They again ask Him for His good pleasure, and Allah bears witness to them of His good pleasure. Then He opens for them what no eye has seen and what has never occurred to any human heart, (all this) lasting for a time equal to the duration of their return from the Friday gathering. That (place) is of green chrysolite or red ruby, with rivers flowing through it and its fruits hanging low, and in it are their spouses and servants. The people of Paradise do not long for anything in Paradise as much as they long for Friday, so that they may gain more of the sight of their Lord, the Mighty and Majestic, and of the honour He bestows. For this reason it has been named Yawm al-Mazid (the Day of Increase)."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu Imran al-Jawni (may Allah have mercy on him) except Abd al-Salam (may Allah have mercy on him), and Khalid (may Allah have mercy on him) is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الألف / 2084
Hadith Takhrij«أخرجه الضياء المقدسي فى «الأحاديث المختارة» برقم: 2291، وأبو يعلى فى «مسنده» برقم: 4089، 4228، والبزار فى «مسنده» برقم: 7527، وابن حجر فى «المطالب العالية» برقم: 673 / 1، 673 / 2، 673 / 3، 673 / 4، وعبد الرزاق فى «مصنفه» برقم: 5559، وابن أبي شيبة فى «مصنفه» برقم: 5560، 5561، والطبراني فى «الكبير» برقم: 35، والطبراني فى «الأوسط» برقم: 6717، 7307»