What is the full sentence/question? ...it would help to know what the entire phrase is.
I think you mean:
"To support my assertion, ..." or "In support of my assertion,..."
"To support my statement, ..." or "In support of my statement, ..."
For example:
"To support my statement, here is a picture."
or it makes more sense if you flip the clause to read, "Here is a picture to support my statement."
I hope this helps!