'Knowest' in the Bible

Thus said Jehovah: By this thou knowest that I am Jehovah; lo, I am smiting with the rod which is in my hand, on the waters which are in the River, and they have been turned to blood,

and he saith, 'To-morrow.' And he saith, According to thy word it is, so that thou knowest that there is none like Jehovah our God,

And I have separated in that day the land of Goshen, in which My people are staying, that the beetle is not there, so that thou knowest that I am Jehovah in the midst of the land,

for, at this time I am sending all My plagues unto thy heart, and on thy servants, and on thy people, so that thou knowest that there is none like Me in all the earth,

And Moses saith unto him, 'At my going out of the city, I spread my palms unto Jehovah -- the voices cease, and the hail is not any more, so that thou knowest that the earth is Jehovah's;

And the servants of Pharaoh say unto him, 'Until when doth this one become a snare to us? send the men away, and they serve Jehovah their God; knowest thou not yet that Egypt hath perished?'