Strong's #834: 'aher (pronounced ash-er')
 a primitive relative pronoun (of every gender and number); who, which, what, that; also (as an adverb and a conjunction) when, where, how, because, in order that, etc.:--X after, X alike, as (soon as), because, X every, for, + forasmuch, + from whence, + how(-soever), X if, (so) that ((thing) which, wherein), X though, + until, + whatsoever, when, where (+ -as, -in, -of, -on, -soever, -with), which, whilst, + whither(- soever), who(-m, -soever, -se). As it is indeclinable, it is often accompanied by the personal pronoun expletively, used to show the connection.
Brown-Driver-Briggs Hebrew Lexicon:
 ׁ 
  'ăsher 
 
 1) (relative participle)
 
 1a) which, who
 1b) that which
 
 2) (conjunction)
 
 2a) that (in object clause)
 2b) when
 2c) since
 2d) as
 2e) conditional if
 
  Part of Speech: relative particle
 
 conjunction
 
Relation: a primitive relative pronoun (of every gender and number)
Usage:
This word is used 5448 times:
2 Samuel 7:11: "And as since the time  that I commanded judges to be over Israel,"
2 Samuel 7:12: "thy seed after  thee, which shall proceed out of thy bowels, and I will establish"
2 Samuel 7:14: "and he shall be my son.  If he commit iniquity, I will chasten him with the rod of men,"
2 Samuel 7:15: "shall not depart away from  him, as I took Saul,"
2 Samuel 7:15: "I took Saul,  whom I put away before"
2 Samuel 7:22: "neither is there any God beside thee, according to all  that we have heard with our ears."
2 Samuel 7:23: "in the earth is like thy people, even like Israel,  whom God went to redeem for a people"
2 Samuel 7:23: "for thy land, before thy people,  which thou redeemedst to thee from Egypt,"
2 Samuel 7:25: "O LORD God, the word  that thou hast spoken thy servant, and concerning"
2 Samuel 7:25: "establish it, forever, and do  as thou hast said."
2 Samuel 8:6: "preserved David whithersoever  whithersoever he went."
2 Samuel 8:7: "the shields of gold  that on the servants of Hadadezer,"
2 Samuel 8:10: "David, to salute him, and to bless him, because  him, because he had fought against Hadadezer,"
2 Samuel 8:11: "with and gold  that he had dedicated of all nations"
2 Samuel 8:11: "he had dedicated of all nations  which he subdued;"
2 Samuel 8:14: "preserved David whithersoever  whithersoever he went."
2 Samuel 9:1: "said, Is there yet  any that is left of Saul, that I may show"
2 Samuel 9:8: "that thou shouldest look  such a dead dog as I"
2 Samuel 9:9: "unto thy master's son all  that pertained to Saul and to all his house."
2 Samuel 9:11: "unto the king, According to all  that the king hath commanded"
2 Samuel 10:2: "Hanun of Nahash,  as his father showed kindness unto"
2 Samuel 10:13: "And Joab drew nigh, and the people  that were with him, unto the battle and they fled"
2 Samuel 10:16: "and brought out the Syrians  that the river: and they came"
2 Samuel 11:16: "unto a place  where he knew that"
2 Samuel 11:20: "when ye did fight? knew ye not  that they would shoot from the wall?"
2 Samuel 11:22: "David  that Joab had sent"
2 Samuel 11:27: "and bore him a son. But the thing  that David had done displeased"
2 Samuel 12:3: "save one little ewe lamb,  which he had bought"
2 Samuel 12:6: "And he shall restore the lamb fourfold, because  because he did"
2 Samuel 12:6: "he did thing, and because  and because he had no pity."
2 Samuel 12:15: "struck the child  that Uriah's wife bore unto David,"
2 Samuel 12:21: "him, What thing is this  that thou hast done? thou didst fast and weep for the child,"
2 Samuel 12:21: "for the child, while it was alive;  but when the child was dead, thou didst rise and eat"
2 Samuel 12:31: "And he brought forth the people  that were therein, and put them under saws, and under harrows and under axes"
2 Samuel 13:5: "the meat in my sight, that  that I may see it, and eat it at her hand."
2 Samuel 13:10: "And Tamar took the cakes  which she had made, and brought them into the chamber"
2 Samuel 13:15: "her exceedingly; so that the hatred  wherewith her was greater"
2 Samuel 13:15: "the hatred wherewith her was greater than the love  wherewith he had loved"
2 Samuel 13:16: "in sending me away than the other  that thou didst unto me. But he would"
2 Samuel 13:19: "and rent of divers colors  that was on her, and laid her hand on"
2 Samuel 13:22: "Absalom hated Amnon, because  because he had forced"
2 Samuel 13:23: "that Absalom had sheepshearers in Baal-hazor,  which is beside Ephraim: and Absalom"
2 Samuel 13:29: "of Absalom did unto Amnon  as Absalom Then all the king's"
2 Samuel 14:7: "that we may kill him, for the life of his brother  whom he slew; and we will destroy the heir"
2 Samuel 14:7: "and so they shall quench my coal  which is left, and shall not leave to my husband"
2 Samuel 14:14: "we must needs die, and are as water spilt on the ground,  which be gathered up again; neither"
2 Samuel 14:15: "Now  therefore that I am come to speak of this unto"
2 Samuel 14:18: "from me, I pray thee, the thing  that I shall ask thee. And the woman said,"
2 Samuel 14:19: "none can turn to the right hand or to the left from aught  that my lord the king"
2 Samuel 14:20: "to know all  things that are in the earth."