Strong's #1722: en (pronounced en)
 a primary preposition denoting (fixed) position (in place, time or state), and (by implication) instrumentality (medially or constructively), i.e. a relation of rest (intermediate between 1519 and 1537); "in," at, (up-)on, by, etc.:--about, after, against, + almost, X altogether, among, X as, at, before, between, (here-)by (+ all means), for (... sake of), + give self wholly to, (here-)in(-to, -wardly), X mightily, (because) of, (up-)on, (open-)ly, X outwardly, one, X quickly, X shortly, (speedi-)ly, X that, X there(-in, -on), through(-out), (un-)to(-ward), under, when, where(-with), while, with(-in). Often used in compounds, with substantially the same import; rarely with verbs of motion, and then not to indicate direction, except (elliptically) by a separate (and different) preposition.
Thayer's Greek Lexicon:
 ̓ 
 
  en 
 
 1) in, by, with etc.
 
  Part of Speech: preposition
Relation: a primary preposition denoting (fixed) position (in place, time or state), and (by implication) instrumentality (medially or constructively), i.e. a relation of rest (intermediate between G1519 and G1537)
  Citing in TDNT: 2:537, 233
 
Usage:
This word is used 2731 times:
Matthew 24:16: "Then let them  which be in Judea flee into the mountains:"
Matthew 24:18: "Neither let him  which is in the field return back"
Matthew 24:19: "And woe  unto them that are with child, and to them that give suck in"
Matthew 24:19: "unto them that are with child, and to them that give suck  in those days!"
Matthew 24:20: "not in the winter, neither  on the sabbath day:"
Matthew 24:26: "unto you, Behold, he is  in the desert; go not forth:"
Matthew 24:26: "desert; go not forth: behold,  he is in the secret chambers; believe"
Matthew 24:30: "of the Son of man  in heaven: and then shall all"
Matthew 24:38: "For as  in the days that were before the"
Matthew 24:40: "Then shall two be  in the field; the one"
Matthew 24:41: "Two women shall be grinding  at the mill; the one shall be taken, and"
Matthew 24:45: "to give them meat  in due season?"
Matthew 24:48: "evil servant shall say  in his heart, My lord"
Matthew 24:50: "of that servant shall come  in a day when he looketh not"
Matthew 24:50: "he looketh not for him, and  in an hour that he is not aware"
Matthew 25:4: "wise took oil  in their vessels with their"
Matthew 25:13: "nor the hour  wherein the Son of man"
Matthew 25:16: "went and traded  with the same, and made them other"
Matthew 25:18: "one went and digged  in the earth, and hid"
Matthew 25:25: "and hid thy talent  in the earth: lo, there thou hast"
Matthew 25:31: "Son of man shall come  in his glory, and all"
Matthew 25:36: "ye visited me: I was  in prison, and ye came unto"
Matthew 25:39: "we thee sick, or  in prison, and came unto"
Matthew 25:43: "ye clothed me not: sick, and  in prison, and"
Matthew 25:44: "or sick, or  in prison, and did not minister"
Matthew 26:5: "But they said, Not  on the feast day, lest there be"
Matthew 26:5: "day, lest there be an uproar  among the people."
Matthew 26:6: "Now when Jesus was  in Bethany, in the house of Simon"
Matthew 26:6: "was in Bethany,  in the house of Simon the leper,"
Matthew 26:13: "Wheresoever this gospel shall be preached  in the whole world,"
Matthew 26:23: "his hand with me  in the dish, the same shall betray"
Matthew 26:29: "it new with you  in my Father's kingdom."
Matthew 26:31: "All ye shall be offended  because of me this night:"
Matthew 26:31: "ye shall be offended because  of me this night: for"
Matthew 26:33: "Though all men shall be offended  because of thee, yet will I never be offended."
Matthew 26:34: "Verily I say unto thee,  That this night, before"
Matthew 26:52: "they that take the sword shall perish  with the sword."
Matthew 26:55: " In that same hour said Jesus to the multitudes, Are ye come out"
Matthew 26:55: "daily with you teaching  in the temple, and"
Matthew 26:69: "Peter sat without  in the palace: and a"
Matthew 27:5: "he cast down the pieces of silver  in the temple, and departed, and"
Matthew 27:40: "temple, and buildest  it in three days, save thyself."
Matthew 27:56: " Among which was Mary Magdalene, and Mary the"
Matthew 27:60: "And laid it  in his own new tomb, which"
Matthew 27:60: "tomb, which he had hewn out  in the rock: and he rolled"
Matthew 28:18: "power is given unto me  in heaven and in earth."
Mark 1:2: "As it is written  in the prophets, Behold, I send"
Mark 1:3: "The voice of one crying  in the wilderness, Prepare ye the way"
Mark 1:4: "John did baptize  in the wilderness, and preach"
Mark 1:5: "baptized of him  in the river of Jordan, confessing"