Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) narrates: The Messenger of Allah (peace and blessings be upon him) was asked about Laylat al-Qadr, and he said: "It is in the last ten nights. Stand in prayer on the third or the fifth night."
Ahmad recorded it, and its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصيام / 5038
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (92/20) اخرجه احمد فى المسند (234/5) ، أخرجه مسند أحمد برقم: 21538»