Who is with you? He replied: He is Muhammad-e-Mustafa صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم. It was then asked: Has he (صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم) been called? He replied: Yes. The door was opened saying this: مَرْحَبًا^م بِہٖ فَنِعْمَ الْمَجِیْءُ جَاءَ i.e. Welcome! How good is the one who has arrived! (Bukhari, vol. 2, pp. 584, Hadees, 3887)

Mufti Ahmad Yar Khan رَحْمَةُ اللهِ تَعَالٰی عَلَيْه has said: The announcement of the arrival of the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم had already been made to the angels and the skies had been decorated in every way, the news of the arrival had been spread everywhere. That night millions of angels came to take the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم in Makkah Mu’azzamah and many angels were carrying out their duties to welcome. Sayyiduna Jibra’eel-e-Ameen صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم took the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم through the door which had not been opened for anyone before [today]. It was only opened for the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم (despite knowing all these things and despite the angles being aware of the blessed arrival of the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم) the three questions of the sky-doorkeeper angel (Who are you? Who is with you? And has he been called?) are only for the purpose that this door is not for you, Jibra’eel. Your door is other than this. Why do you want to enter here today? He replied that today I am with the one for whom this door has been made and kept closed. Today is the day to open this door, therefore these questions were only asked to fulfil the legal and procedural measures. (Mirat-ul-Manajeeh, vol. 8, pp. 138)

When the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم went above the sky after passing through the door, he saw Sayyiduna Adam عَـلَيْـهِ الـسَّـلَام sitting. Sayyiduna Jibra’eel عَـلَيْـهِ الـصَّلٰوة ُ وَالـسَّلَام humbly said: He is your father Sayyiduna Adam عَـلَيْـهِ الـسَّـلَام. Please say Salaam to him. The Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم said Salaam and he عَـلَيْـهِ الـسَّـلَام replied to his Salaam and then expressed his joy upon his arrival in these words. مَرْحَبًا^م بِالْاِبْنِ الصَّالِحِ وَالنَّبِیِّ الصَّالِحِ i.e. Welcome to the righteous son and righteous Nabi.  (Sahih Bukhari, vol. 2, pp. 584, Hadees 3887)