Sayyiduna Buraydah (may Allah be pleased with him) states: I heard the Prophet (peace and blessings be upon him) say: "After me many military expeditions will be sent out; be in the army that goes to Khurasan, and then encamp in the city called Marw, for Dhu al-Qarnayn built it and prayed for blessing for its inhabitants; no evil will harm its inhabitants."
Ahmad recorded it, and al-Tabarani recorded something similar in al-Mu'jam al-Kabir and al-Mu'jam al-Awsat. The chain of Ahmad and of al-Mu'jam al-Awsat contains a narrator, Aws bin Abdullah, and the chain of al-Mu'jam al-Kabir contains a narrator, Husam bin Missak, and there is agreement on the weakness of both of them.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 16683
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«اخرجه احمد فى المسند (357/4) ، أخرجه مسند أحمد برقم: 22509»