'Serious' in the Bible

Give ear now to their voice: but make a serious protest to them, and give them a picture of the sort of king who will be their ruler.

And for everything he undertook, in connection with the work of the house of God and his law and orders, he got directions from God and did it with serious purpose; and things went well for him.

To make the simple-minded sharp, and to give the young man knowledge, and serious purpose: