'Diligently' in the Bible

O God, you [are] my God; I will seek you diligently. My soul thirsts for you; my flesh longs for you [as] in a dry and weary land without water.

You have commanded your precepts, that [we] should keep [them] diligently.

He who diligently goes [out] with weeping, carrying the seed bag, shall certainly come [in] with rejoicing, carrying his sheaves.