Exodus 32:26-29

ASV_Strongs(i)
  26 H4872 then Moses H5975 stood H8179 in the gate H4264 of the camp, H559 and said, H3068 Whoso is on Jehovah's H1121 side, let him come unto me. And all the sons H3878 of Levi H622 gathered themselves together unto him.
  27 H559 And he said H559 unto them, Thus saith H3068 Jehovah, H430 the God H3478 of Israel, H7760 Put H376 ye every man H2719 his sword H3409 upon his thigh, H5674 and go H7725 to H8179 and fro from gate H8179 to gate H4264 throughout the camp, H2026 and slay H376 every man H251 his brother, H376 and every man H7453 his companion, H376 and every man H7138 his neighbor.
  28 H1121 And the sons H3878 of Levi H6213 did H1697 according to the word H4872 of Moses: H5307 and there fell H5971 of the people H3117 that day H7969 about three H505 thousand H376 men.
  29 H4872 And Moses H559 said, H4390 Consecrate yourselves H3117 to-day H3068 to Jehovah, H3588 yea, H376 every man H1121 against his son, H251 and against his brother; H5414 that he may bestow H1293 upon you a blessing H3117 this day.