'What is Good' in the Bible

And Elkanah her husband said to her, Do what is good in thy sight: abide until thou hast weaned him; only, may Jehovah fulfil his word. And the woman abode, and gave her son suck until she weaned him.

And Samuel told him all the words, and kept nothing back from him. And he said, It is Jehovah: let him do what is good in his sight.

Then said he to all Israel, Be ye on one side, and I and Jonathan my son will be on the other side. And the people said to Saul, Do what is good in thy sight.