From BiblePortal Wikipedia

Smith's Bible Dictionary [1]

Sibra'im. (Twofold Hope). One of the landmarks, on the northern boundary of the Holy Land, as stated by Ezekiel.  Ezekiel 47:16. It has not been identified.

Hastings' Dictionary of the Bible [2]

Sibraim . A point on the ideal northern boundary of the Holy Land (  Ezekiel 47:16 ); site uncertain.

Cf. Ziphnon.

Morrish Bible Dictionary [3]

A northern landmark of Palestine, lying between Damascus and Hamath.  Ezekiel 47:16 . Not identified.

Fausset's Bible Dictionary [4]

A landmark N. of the Holy Land ( Ezekiel 47:16), between the boundary of Damascus and Hamath.

Holman Bible Dictionary [5]

 2 Kings 17:24

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [6]

[many Sibra'im] (Heb. Sibra'yim, סְבְרִיַ , Twofold Hope [Gesenius], or Double Hill [Furst]; Sept. Σαβαρίμ . v.r. [ Σ ] ῾Εβραμή or Ε , Ράμ [ Ἠλειάμ ]; Vulg. Sabarim ) , one of the landmarks on the northern boundary of the Holy Land, between Berothah and Hazar-hatticon, and between the boundary of Damascus and that of Hamath ( Ezekiel 47:16). Keil ( Comment. ad loc.) suggests that it may be identical with the ZIPHRON (See Ziphron) (q.v.) of the parallel passage ( Numbers 34:9).

International Standard Bible Encyclopedia [7]

sib - rā´im , sib´ra - im ( סברים , ṣibhrayim  ; Codex Vaticanus Σεβράμ , Sebrám  ; Codex Alexandrinus Σεφράμ , Sephrám ): A place named as on the boundary of Palestine in Ezekiel's ideal delineation, "between the border of Damascus and the border of Hamath" (  Ezekiel 47:16 ). It may possibly be represented by the modern Khirbet Sanbariyeh on the west bank of Nahr el - Ḥasbāny , about 3 miles Southeast of ‛Abil .