The Statute of Frauds does not apply to an original debt of the promisor

Dear PAO,

I am a contractor of a house where, for a sum of money, I build a house for others. In one of my contracts, there came a time when I had difficulty in financing the materials for my construction projects. To cover this deficit, the principal in one of my construction projects, agreed to pay for the construction materials that I ordered from the supplier of the same.