Strong's #7650: shaba` (pronounced shaw-bah')
 a primitive root; propr. to be complete, but used only as a denominative from 7651; to seven oneself, i.e. swear (as if by repeating a declaration seven times):--adjure, charge (by an oath, with an oath), feed to the full (by mistake for 7646), take an oath, X straitly, (cause to, make to) swear.
Brown-Driver-Briggs Hebrew Lexicon:
 ׁ 
  shâba‛ 
 
 1) to swear, adjure
 
 1a) (Qal) sworn (participle)
 1b) (Niphal)
 
 1b1) to swear, take an oath
 1b2) to swear (of Jehovah by Himself)
 1b3) to curse
 
 1c) (Hiphil)
 
 1c1) to cause to take an oath
 1c2) to adjure
 
  Part of Speech: verb
Relation: a primitive root
Usage:
This word is used 186 times:
Genesis 21:23: "Now  therefore swear unto me here by God that thou wilt not deal falsely with me, nor with my son, nor with my son's son: but according to the kindness"
Genesis 21:24: "And Abraham said, I  will swear."
Genesis 21:31: "place Beer-sheba; because there  they swore both"
Genesis 22:16: "And said,  By myself have I sworn, saith the LORD, for because thou hast done"
Genesis 24:3: " And I will make thee swear by the LORD, the God of heaven, and the God of the earth, that thou shalt not"
Genesis 24:7: "and from the land of my kindred, and which spoke unto me, and that  swore unto me, saying,"
Genesis 24:9: "the thigh of Abraham his master,  and swore to him concerning that matter."
Genesis 24:37: "And my master  made me swear, saying, Thou shalt not take a wife to my son of the daughters"
Genesis 25:33: "And Jacob said,  Swear to me this day; and he swore unto him: and he sold his birthright"
Genesis 25:33: "said, Swear to me this day;  and he swore unto him: and he sold his birthright unto Jacob."
Genesis 26:3: "the oath which  I swore unto Abraham thy father;"
Genesis 26:31: "And they rose up quickly in the morning,  and swore one to another: and Isaac sent them away, and they departed"
Genesis 31:53: "judge between us. And Jacob  swore by the fear of his father Isaac."
Genesis 47:31: "And he said,  Swear unto me. And he swore unto him. And Israel bowed himself upon the bed's head."
Genesis 47:31: "And he said, Swear  unto me. And he swore unto him. And Israel bowed himself upon the bed's head."
Genesis 50:5: "My father  made me swear, saying, Lo, I die: in my grave which"
Genesis 50:6: "thy father, according as  he made thee swear."
Genesis 50:24: "land unto the land which  he swore to Abraham, to Isaac, and to Jacob."
Genesis 50:25: "And Joseph  took an oath of the children of Israel, saying, God will surely visit"
Exodus 13:5: "and the Hivites, and the Jebusites, which  he swore unto thy fathers to give thee, a land flowing"
Exodus 13:11: "the land of the Canaanites, as  he swore unto thee and to thy fathers, and shall give"
Exodus 13:19: "of Joseph with him: for  he had straitly sworn the children of Israel,"
Exodus 13:19: "of Joseph with him: for  he had straitly sworn the children of Israel,"
Exodus 32:13: "and Israel, thy servants, to whom  thou sworest by thine own self, and saidst unto them, I will multiply"
Exodus 33:1: "out of the land of Egypt, unto the land which  I swore unto Abraham, to Isaac,"
Leviticus 5:4: "Or if a soul  swear, pronouncing with his lips to do evil, or"
Leviticus 6:3: "have found that which was lost, and lieth  concerning it, and sweareth falsely; in any"
Leviticus 6:5: "Or all that about which  he hath sworn falsely; he shall even restore"
Leviticus 19:12: "And ye shall not  swear by my name falsely, neither shalt thou profane the name of thy God:"
Numbers 5:19: "And the priest  shall charge her by an oath, and say unto the woman, If no"
Numbers 5:21: "Then the priest  shall charge the woman with an oath of cursing, and the priest shall say"
Numbers 11:12: "unto the land which  thou sworest unto their fathers?"
Numbers 14:16: "people into the land which  he swore unto them therefore he hath slain them in the wilderness."
Numbers 14:23: "the land which  I swore unto their fathers, neither shall any of them that provoked"
Numbers 30:2: "a vow unto the LORD, or  swear an oath to bind his soul"
Numbers 32:10: "was kindled the same time,  and he swore, saying,"
Numbers 32:11: "and upward, shall see the land which  I swore unto Abraham, unto Isaac,"
Deuteronomy 1:8: "the land which the LORD  swore unto your fathers, Abraham, Isaac, and Jacob,"
Deuteronomy 1:34: "the voice of your words, and was wroth,  and swore, saying,"
Deuteronomy 1:35: "that good land, which  I swore to give unto your fathers,"
Deuteronomy 2:14: "were wasted out from among the host, as the LORD  swore"
Deuteronomy 4:21: "Furthermore the LORD was angry with me for your sakes,  and swore that I should not go over"
Deuteronomy 4:31: "the covenant of thy fathers which  he swore"
Deuteronomy 6:10: "thee into the land which  he swore unto thy fathers, to Abraham, to Isaac, and to Jacob,"
Deuteronomy 6:13: "the LORD thy God, and serve  him, and shalt swear by his name."
Deuteronomy 6:18: "land which the LORD  swore unto thy fathers,"
Deuteronomy 6:23: "he might bring us in, to give us the land which  he swore unto our fathers."
Deuteronomy 7:8: "you, and because he would keep the oath which  he had sworn unto your fathers, hath the LORD"
Deuteronomy 7:12: "the covenant and the mercy which  he swore unto thy fathers:"
Deuteronomy 7:13: "in the land which  he swore unto thy fathers to give"