New Living Translation
At this they began to argue with each other because they hadn’t brought any bread.

American Standard Version
And they reasoned one with another, saying, We have no bread.

Berean Study Bible
So they began to discuss with one another the fact that they had no bread.

Douay-Rheims Bible
And they reasoned among themselves, saying: Because we have no bread.

English Revised Version
And they reasoned one with another, saying, We have no bread.

King James Bible
And they reasoned among themselves, saying, It is because we have no bread.

World English Bible
They reasoned with one another, saying, "It's because we have no bread."

Young's Literal Translation
and they were reasoning with one another, saying -- 'Because we have no loaves.'

Mark 8:16 Additional Translations ...