Take my word for it or take my word for this?

Question

Me and a friend got into an argument. He says that you can say "Take my word for this". I say that the proper use is "Take my word for it". Could someone elaborate on each of those and tell us who is right?

Answer 1

You may want to consider beginning with, "A friend and I." As to your question, "Take my word for it" is the correct answer because it is an expression meaning, "Trust me."

Answer 2

Take my word for it