A narration by al-Bukhari has:

"When one of you has been away from home for a long time, he must not come to his family during the night."

وَفِي رِوَايَةٍ لِلْبُخَارِيِّ : { إِذَا أَطَالَ [1]‏ أَحَدُكُمُ الْغَيْبَةَ , فَلَا يَطْرُقْ أَهْلَهُ لَيْلاً } [2]‏ .‏