They were using this question as a trap, in order to have a basis for accusing him. But Jesus bent down and started to write on the ground with his finger.
NIV
This they said to try (test) Him, hoping they might find a charge on which to accuse Him. But Jesus stooped down and wrote on the ground with His finger.
AMP
This they said, tempting him, that they might have to accuse him. But Jesus stooped down, and with his finger wrote on the ground, as though he heard them not.
KJV
"But if they do not believe these two signs or listen to you, take some water from the Nile and pour it on the dry ground. The water you take from the river will become blood on the ground."
NIV
But if they will also not believe these two signs or heed your voice, you shall take some water of the river [Nile] and pour it upon the dry land; and the water which you take out of the river [Nile] shall become blood on the dry land.
AMP
And it shall come to pass, if they will not believe also these two signs, neither hearken unto thy voice, that thou shalt take of the water of the river, and pour it upon the dry land: and the water which thou takest out of the river shall become blood upon the dry land.
KJV
He led you through the vast and dreadful wilderness, that thirsty and waterless land, with its venomous snakes and scorpions. He brought you water out of hard rock.
NIV
Who led you through the great and terrible wilderness, with its fiery serpents and scorpions and thirsty ground where there was no water, but Who brought you forth water out of the flinty rock
AMP
Who led thee through that great and terrible wilderness, wherein were fiery serpents, and scorpions, and drought, where there was no water; who brought thee forth water out of the rock of flint;
KJV