It is narrated from Imam Amir al-Sha'bi (may Allah have mercy on him) concerning this saying of Allah, the Mighty and Majestic: "And We certainly gave Musa nine clear signs" [Surah al-Isra': 101], that he said: "What is meant by these nine clear signs is the (shining) hand of Sayyiduna Musa (peace be upon him), his staff, the years of famine, the flood, the locusts, the lice, the frogs, the blood, and the decrease in the yield of fruits."
Takhrij: Imam Musaddad bin Musarhad narrated this report in his Musnad, and its chain is sahih (authentic).
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب التفسير / 3651
Hadith Gradingمحدثین:إسناده صحيح، مقطوع
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :إسناده صحيح مقطوع » «أخرجه شرح مشكل الآثار للطحاوي (1/63)، دون رقم مطبوع»