It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) related a long hadith in which he (peace and blessings be upon him) said: "And whoever takes a ritual bath (ghusl) on Friday (with the intention of the Sunnah), it is as though he fasted a day in the path of Allah, the Mighty and Majestic, and that one day is (in reward) equal to seven hundred days."
Imam Abd bin Humayd narrated this hadith in his Musnad; in its chain is a narrator named Mindal bin Ali, whom the Imams of jarh and ta'dil have graded da'if (weak); therefore this narration is weak in its chain.
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / أبواب الجمعة / 688
Hadith Gradingمحدثین:إسناده ضعيف
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :إسناده ضعيف. » «أخرجه عبد بن حميد فى "المنتخب من مسنده"، 853، وأورده ابن حجر فى "المطالب العالية"، 1575، 688، 809»