Verses of the Holy Qur’an also prove this matter...
Some of them are as follows: In Kafi from a chain of narrators that is equal to authentic, from His Eminence, Abu Abdillah Sadiq (as) it is narrated that he said: The Messenger of Allah (S) said: “The Almighty Allah opens a door for His servant by his thankfulness whose increase had been stopped.”[^5] In the same book it is narrated from His Eminence, Sadiq (as) that he said: It is written in the Torah that: Thank the one who has given you a blessing and reward the one who has thanked you.
Because if blessings are thanked for, they shall not be destroyed. But if they are not thanked for they would not be lasting. Thankfulness is the source of increase in bounties and is a guarantee against their being changed.[^6] Also in the tradition of Muawiyah bin Wahab quoted from His Eminence, Sadiq (as) it is mentioned that he said: “Anyone who thanks is given an increase.
The Almighty Allah says: “If you are grateful, I would certainly give to you more…”[^7] Meaning Of Thankfulness Thankfulness is a recompense for the bounty received and thanklessness is its denial. I have realized this by the grace and inspiration of the Almighty Allah and all the explanations about thankfulness go back to this same point. And also its types that have come in traditions also revert to this same meaning.