Who said "We're only as strong as we are together."?

This quote is attributed to Black Widow (MCU).

We're only as strong as we are together. - Black Widow (MCU)

"We're only as strong as we are together."

Black Widow (MCU)

"I've been red in my ledger for a long time. I'm trying to wipe it out."

"Sometimes you need to go back in order to move forward."

"I'm always picking up after you boys."

"You really think you can hold onto the cube? It has a lot of voltage."