'Diligently' in the Bible

Why haven't you pardoned my transgression and taken away my iniquity? Now I'm about to lie down in the dust. You will seek me diligently, but I won't be around!"

"Look! Like wild donkeys in the wilderness, they work diligently as they seek wild game in the desert, food for them and their young ones.

I was a father to the needy; I diligently inquired into the case of those I didn't know.