Number Forty is a special number in the religious and Islamic culture.
The significance of the age of 40 is undeniable, as Prophet Muhammad said, “When one gets forty God tells his two guardian angels, ‘From now on, be strict on him and note every small and big deed he does.’” This shows that one’s personality is formed before he becomes 40 years old and every inner change will become harder after that.
Muslim scholars, especially mystics, consider forty as a significant number in the fields of self-purification, finding one’s talents, and reaching moral heights.
In the Quran
The number forty has been mentioned with three different virtues in the Quran:
- We have enjoined on man kindness to his parents: In pain did his mother bear him, and in pain did she give him birth. The carrying of the (child) to his weaning is (a period of) thirty months. At length, when he reaches the age of full strength and attains 40 years, he says, “O my Lord! Grant me that I may be grateful for Thy favor which Thou has bestowed upon me, and upon both my parents, and that I may work righteousness such as Thou mayest approve; and be gracious to me in my issue. Truly have I turned to Thee and truly do I bow (to Thee) in Islam.” (Al-Ahqaf: 15)
- Allah said: “Therefore will the land be out of their reach for 40 years: In distraction will they wander through the land: But sorrow thou not over these rebellious people. (Al-Ma’ida: 26)
- “And remember We appointed forty nights for Moses, and in his absence ye took the calf (for worship), and ye did grievous wrong.” And “We appointed for Moses thirty nights, and completed (the period) with ten (more): thus was completed the term (of communion) with his Lord, 40 nights. And Moses had charged his brother Aaron (before he went up): Act for me amongst my people: Do right, and follow not the way of those who do mischief.” (Al-Baqara: 51)
There are different interpretations of the above mentioned verses concerning the number forty.
Verse 15 of Al-Ahqaf Surah could be related to the perfection of man at the age of 40. However, most interpreters believe that a man gains perfection at thirty three.
Imam Sadiq believed that man gains perfection at the age of thirty three and he will remain the same till he gets forty.
Anyway, many others believe that one’s mental ability is perfect at the age of 40, as Muhammad was appointed the prophet of God in the same age.
What is the Secret of Forty?
Some scholars like Sadr-al-Motalein Shirazi maintain that only Prophets and messengers of God know the secret of the number, forty.
There are some sayings indicating that God has made Adam out of soil in forty days. It took man forty days to turn from what it is to a divine creature. Therefore, in order for one to get back to his divine nature, one needs forty days of time.