'Faithfulness' in the Bible

And he commanded them, saying, "Thus you must do in the fear of Yahweh in faithfulness and with a whole heart.

And [they were] enrolled with all their little ones, their wives, their sons, and their daughters for the whole assembly because of their faithfulness. And they sanctified themselves in holiness.

After these things and these [acts of] faithfulness, Sennacherib the king of Assyria came, and he came against Judah. And he encamped against the fortified cities and planned to break them down for himself.