'According' in the Bible

For the sake of your promise and according to your purpose you have done this great thing in order to reveal it to your servant.

When he would shave his head -- at the end of every year he used to shave his head, for it grew too long and he would shave it -- he used to weigh the hair of his head at three pounds according to the king's weight.

So David went up as Gad instructed him to do, according to the Lord's instructions.