Prove that when two different lines intersect, then they lie in exactly one plane!

Let two lines $$l$$ and $$m$$ intersect, then they lie in the same plane $$V$$. However how to prove that the plane $$V$$ is unique that is if $$V’$$ contain line $$l$$ and line $$m$$, then $$V’=V$$?

I have tried with proof by contradiction but couldn’t proceed.