Salim (may Allah have mercy on him) narrates from his father (Sayyiduna Abdullah bin Umar, may Allah be pleased with them both), attributing it to the Prophet (peace and blessings be upon him): A man saw Laylat al-Qadr in the last ten (nights), so the Messenger of Allah (peace and blessings be upon him) said: "I see that your dreams have agreed on this; so seek it in the last ten (nights)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8529
Salim (may Allah have mercy on him) narrates from his father (Sayyiduna Abdullah bin Umar, may Allah be pleased with them both) that a man saw Laylat al-Qadr on the twenty-seventh night, so the Messenger of Allah (peace and blessings be upon him) said: "Your dream is in the last ten (nights), so seek it in the odd nights of them."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8530
Sayyidah Aishah (may Allah be pleased with her) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Seek Laylat al-Qadr in the odd nights of the last ten (nights) of the month of Ramadan."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8531