عَنْ اَبِي عَبْدِ اللهِؑ قَالَ عُرِجَ بِالنَّبِيِّ ﷺ السَّمَاءَ مِائَةً وَ عِشْرِينَ مَرَّةً مَا مِنْ مَرَّةٍ اِلَّا وَ قَدْ اَوْصَى اللهُ عَزَّ وَ جَلَّ فِيهَا اِلَى النَّبِيِّ بِالْوَلَايَةِ لِعَلِيٍّ وَ الْاَئِمَّةِ مِنْ بَعْدِهِؑ اَكْثَرَ مِمَّا اَوْصَاهُ بِالْفَرَائِضِ
Imam Sadeq (peace be upon him) informs, “The Holy Prophet (peace be upon him and his holy progeny) was taken to the skies one hundred and twenty times. Each time, Allah – Mighty and Majestic be He – admonished the Prophet (peace be upon him and his holy progeny) vis-à-vis the mastership of Ali (peace be upon him) and the Imams (peace be upon them) after him more than He admonished him (peace be upon him and his holy progeny) about the religious duties.”
References:
1. Behaar al-Anwaar, vol. 23, p.69, H. 4 أن الإمامة لا تكون إلا بالنص و يجب على الإمام النص على من بعده
2. Basaaer al-Darajaat, p. 79, H. 10 and al-Khesaal, vol. 2, p. 600, H. 3 عرج النبي ﷺ إلى السماء مائة و عشرين مرة