G3727–ὅρκος–horkos

"Again you have heard that it was said to them of old time, 'You shall not make false vows, but shall perform to the Lord your vows,'

ὅρκους horkous “oaths”

Whereupon he promised with an oath to give her whatever she should ask.

ὅρκου horkou “oath”

The king was grieved, but for the sake of his oaths, and of those who sat at the table with him, he commanded it to be given,

ὅρκους horkous “oaths”

Again he denied it with an oath, "I don't know the man."

ὅρκου horkou “an oath”

The king was exceedingly sorry, but for the sake of his oaths, and of his dinner guests, he didn't wish to refuse her.

ὅρκους horkous “oaths”

The oath which he spoke to Abraham, our father,

ὅρκον horkon “[the] oath”

Therefore, being a prophet, and knowing that God had sworn with an oath to him that of the fruit of his body, according to the flesh, he would raise up the Christ to sit on his throne,

ὅρκῳ horkō “with an oath”

For men indeed swear by a greater one, and in every dispute of theirs the oath is final for confirmation.

ὅρκος· horkos “oath;”

In this way God, being determined to show more abundantly to the heirs of the promise the immutability of his counsel, interposed with an oath;

ὅρκῳ, horkō “by an oath,”

But above all things, my brothers, don't swear, neither by heaven, nor by the earth, nor by any other oath; but let your "yes" be "yes," and your "no," "no;" so that you don't fall into hypocrisy.

ὅρκον· horkon “oath;”