Hadith.2962 - Imam (as) said regarding the words of Allah (swt), the Exalted: "So travel freely throughout the land for four months" (Quran 9:2):
"These are twenty days of Dhu al-Hijjah, the month of Muharram, Safar, the month of Rabi' al-Awwal, and ten days of Rabi' al-Thani. The ten days of the beginning of Dhu al-Hijjah are not counted among the four months."