'Faithfulness' in the Bible

now let it be that the girl to whom I say, ‘Please, let down your jar so that I may [have a] drink,’ and she replies, ‘Drink, and I will also give your camels water to drink’—may she be the one whom You have selected [as a wife] for Your servant Isaac; and by this I will know that You have shown lovingkindness (faithfulness) to my master.”

So now if you are going to show kindness and truth to my master [being faithful to him], tell me; and if not, tell me, that I may turn to the right or to the left [and go on my way].”

I am unworthy of all the lovingkindness and compassion and of all the faithfulness which You have shown to Your servant. With only my staff [long ago] I crossed over this Jordan, and now I have become [blessed and increased into these] two groups [of people].