Abdullah bin Unays (may Allah be pleased with him) narrates: We were in the desert, and we said: If we take our families with us it will be hard for us, and if we leave them behind some hardship may befall them. So they sent me to the Messenger of Allah (peace and blessings be upon him), and I was the youngest of them. I told him (peace and blessings be upon him) what they had said, and he (peace and blessings be upon him) commanded us "to stand (in prayer) on the twenty-third night."
Ibn al-Had said: So Muhammad bin Ibrahim used to exert himself (in worship) on that night.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8537