'Diligently' in the Bible

The afflicted will eat and be satisfied;Those who [diligently] seek Him and require Him [as their greatest need] will praise the Lord.May your hearts live forever!

I will remember my song in the night;I will meditate with my heart,And my spirit searches:

When He killed [some of] them, then those remaining sought Him,And they returned [to Him] and searched diligently for God [for a time].

Who is wise? Let him observe and heed these things;And [thoughtfully] consider the lovingkindness of the Lord.

You have ordained Your precepts,That we should follow them with [careful] diligence.