you (plural) said, you (plural) told
That’s not what you said.
Me dijisteis que murieron en accidente de coche.
You told me they died in a car accident.
— Harry Potter y la piedra filosofal (2001)
Tom no entiende lo que dijisteis.
Tom doesn't understand what you said.
Lo que dijisteis le hizo sentirse mucho mejor.
What you said made him feel much better.