Sayyiduna Abdullah bin Unays (may Allah be pleased with him) relates: We were discussing (this matter) among ourselves in Ramadan, and our people said: It is hard for us to come (to Madinah) with our children and our women, and if we come and leave them behind, we fear they will come to harm; yet we also dislike that this night should pass us by. So would you agree that we send (someone) to the Messenger of Allah (peace and blessings be upon him) who will mention this to him (peace and blessings be upon him) and ask him (peace and blessings be upon him) to tell us a night on which we may come? Abdullah said: So they sent me, because I used to talk with them. I came to the Messenger of Allah (peace and blessings be upon him), mentioned this to him (peace and blessings be upon him), and asked him (peace and blessings be upon him) to tell us a night on which we might come (to Madinah). He (peace and blessings be upon him) said: "Come on the twenty-third night." So Sayyiduna Abdullah (may Allah be pleased with him) would come on that night, and when morning came he would go back.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13941