Verses for know this

And David sware moreover, and said, Thy father certainly knoweth that I have found grace in thine eyes; and he saith, Let not Jonathan know this, lest he be grieved: but truly as the LORD liveth, and as thy soul liveth, there is but a step between me and death.

For I know this, that after my departing shall grievous wolves enter in among you, not sparing the flock.

Howbeit we know this man whence he is: but when Christ cometh, no man knoweth whence he is.

And Zacharias said unto the angel, Whereby shall I know this? for I am an old man, and my wife well stricken in years.

But know this, that if the goodman of the house had known in what watch the thief would come, he would have watched, and would not have suffered his house to be broken up.

When I thought to know this, it was too painful for me;