It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that he mentioned the blessed saying (of the Prophet (peace and blessings be upon him)) concerning the story of the Dajjal: "So whoever of you meets him (the Dajjal) should spit in his face."
Ibn Abi Umar said: Hisham bin Sulayman al-Makhzumi narrated to us; he said: Isma'il bin Rafi' informed us through the person who had told him, and he mentioned the hadith on the story of the Dajjal from Sayyiduna Abu Umamah (may Allah be pleased with him). This report is also narrated by Imam Ibn Majah through another chain, by way of Isma'il bin Rafi', from Yahya bin Abi Amr, from Abu Umamah (may Allah be pleased with him), and Hisham added these words in this report: "So whoever of you meets him (the Dajjal) should spit in his face."
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الفتوح / 4522
Hadith Gradingمحدثین:إسناده ضعيف، منقطع
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :إسناده ضعيف منقطع » «أخرجه المستدرك للحاكم برقم: 8715، وأخرجه سنن ابن ماجه برقم: 4077، وأخرجه المعجم الكبير للطبراني برقم: 7645»