'Whoever' in the Bible

But whoever obeys his word, truly in this person the love of God has been perfected. By this we know that we are in him.

But whoever has the world's possessions and sees his fellow Christian in need and shuts off his compassion against him, how can the love of God reside in such a person?

We are from God; the person who knows God listens to us, but whoever is not from God does not listen to us. By this we know the Spirit of truth and the spirit of deceit.