Thanking people

There's a hadith that says whomsoever does not thank people, has not thanked God.  And there's a verse in the Qur'an that says "If you are thankful, I will surely give you more." (14:7).

If you look at the verse on it's own, the connection between being thankful and getting more is not that obvious.  Of course we believe that it's true, but how being thankful can get us more is not clear.  We believe in the connection as an act of faith.

The hadith, however, gives a clue to at least one mechanism through which being thankful can get us more.  People are far more inclined to give to those who appreciate their efforts than to those who don't.  So, by thanking people, we endear ourselves to them so that they will be inclined to give us more.  It's one way that God gives us more if we are thankful.

Thankfulness

There is a verse in the Qur'an that can be translated as: "If you are thankful, I will surely give you more." (14:7).

It's a guarantee.

So much so, that when people complained to some scholars about their straitened circumstances, these scholars would ask them to reflect on the quality of their thankfulness.

Because the verse says, "If you are thankful, I will surely give you more." (14:7).