As soon as the king heard this, he was deeply distressed and set his mind on delivering Daniel, and he labored until sundown to rescue him.
KJV
Then the king, when he heard [these] words, was sore displeased with himself, and set [his] heart on Daniel to deliver him: and he laboured till the going down of the sun to deliver him.
ASV
Then the king, when he heard these words, was sore displeased, and set his heart on Daniel to deliver him; and he labored till the going down of the sun to rescue him.