Isaiah 36:8

Now therefore give pledges to my master the king of Assyria,
&c.] Or; "hostages" ^F8; that thou wilt not rebel against him, but be faithful to him, and he will withdraw his army; or give security for the horses after promised: "or mingle thyself with him"; agree the matter with him, give pledges for future fidelity; or join in battle with him, come out and fight him, if able: and I will give thee two thousand horses, if thou be able on thy part
to set riders on them;
thus scoffing at him, as if he had not so many soldiers to bring out against him; or so many men in his kingdom as had skill enough to ride a horse; in his bravado he signifies, that if he would come out and fight him, he would lend him so many horses, if he could put men upon them, to assist him; this he said as boasting of his master's strength and power, and in scorn and derision at Hezekiah's weakness.