عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا قَالَ جَاءَ عُمَرُ رَضِيَ اللَّهُ عَنْهُ إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ وَهُوَ فِي مَشْرَبَةٍ فَقَالَ السَّلَامُ عَلَيْكَ يَا رَسُولَ اللَّهِ السَّلَامُ عَلَيْكَ أَيَدْخُلُ عُمَرُ
Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates that Sayyiduna Umar (may Allah be pleased with him) came to the Noble Prophet (peace and blessings be upon him), while he was sitting in an upper room. Sayyiduna Umar (may Allah be pleased with him) said: "Peace be upon you, O Messenger of Allah! Peace be upon you, may Umar come inside?"