Which one is correct?

[RoseSpring]

I heard that you send part of your salary
to a charitable organization in order to spend it on the poor.

Or

I heard that you send part of your salary
to a charitable organization.

and the rest of the meaning shall be understood?

 

[tedtmc]

A charitable organization looks after the welfare of the poor.
So the second part of your sentence 'in order to spend it on the poor' does seem redundant unless you something more to say.

not a teacher

 

[emsr2d2]

I heard that you send part of your salary
to a charitable organization in order to spend it on the poor.

Or

I heard that you send part of your salary
to a charitable organization.

and the rest of the meaning shall be understood?

It entirely depends on which charitable organisation it is. Not all charities are to do with the poor. For instance, there are plenty of charities to do with animal welfare and medical research. If you want to be specific about where the money is going, then I would say:

I heard that you send part of your salary to a charitable organisation which helps the poor.

(Note difference in spelling : organiZation - American English; organiSation - British English)

 

[tedtmc]

Not all charities are to do with the poor. For instance, there are plenty of charities to do with animal welfare and medical research

Charities are generally to do with the poor, whether they are poor people or poor animals or poor medical researchers.

char·i·ty   –noun,plural-ties.
1.generous actions or donations to aid the poor, ill, or helpless: to devote one's life to charity.
2.something given to a person or persons in need; alms: She asked for work, not charity.
3.a charitable act or work.
4.a charitable fund, foundation, or institution: He left his estate to a charity.

 

[emsr2d2]

Charities are generally to do with the poor, whether they are poor people or poor animals or poor medical researchers.

char·i·ty   –noun,plural-ties.
1.generous actions or donations to aid the poor, ill, or helpless: to devote one's life to charity.
2.something given to a person or persons in need; alms: She asked for work, not charity.
3.a charitable act or work.
4.a charitable fund, foundation, or institution: He left his estate to a charity.

I will assume that you are using the two meanings of "poor". As far as people are concerned then, yes, generally charities help people in poverty (poor people).

Animal charities help animals who are in danger, sick, helpless, injured etc (here, poor means unfortunate).

Personally, I can't think of any suitable way to use the word "poor" when attached to medical research! Most research institutes are worth a small fortune and receive a lot of money from various places. The majority of them certainly couldn't be described as poor!

 

[RoseSpring]

Thanks for help indeed.

That's more than enough. :up:​