Deuteronomy 25:5-9

CKJV_Strongs(i)
  5 H251 If brothers H3427 live H3162 together, H259 and one H4191 of them die, H1121 and have no child, H802 the wife H4191 of the dead H2351 shall not marry outside H376 unto a stranger: H2993 her husband's brother H935 shall go in H3947 unto her, and take H802 her to him to wife, H2992 and perform the duty of an husband's brother unto her.
  6 H1060 And it shall be, that the firstborn H3205 which she bears H6965 shall succeed H8034 in the name H251 of his brother H4191 which is dead, H8034 that his name H4229 be not put out H3478 of Israel.
  7 H376 And if the man H2654 like H3947 not to take H2994 his brother's wife, H2994 then let his brother's wife H5927 go up H8179 to the gate H2205 unto the elders, H559 and say, H2993 My husband's brother H3985 refuses H6965 to raise up H251 unto his brother H8034 a name H3478 in Israel, H14 he will H2992 not perform the duty of my husband's brother.
  8 H2205 Then the elders H5892 of his city H7121 shall call H1696 him, and speak H5975 unto him: and if he stand H559 to it, and say, H2654 I like H3947 not to take her;
  9 H2994 Then shall his brother's wife H5066 come H5869 unto him in the presence H2205 of the elders, H2502 and loose H5275 his shoe H7272 from off his foot, H3417 and spit H6440 in his face, H6030 and shall answer H559 and say, H6213 So shall it be done H376 unto that man H1129 that will not build up H251 his brother's H1004 house.