From BiblePortal Wikipedia

Hawker's Poor Man's Concordance And Dictionary [1]

We read of the gold of Upham, perhaps the same as Opher: the certain man, Daniel saw in a vision, had his loins apparently girded with it. ( Daniel 10:5) The church speaks of her Lord's head, as of this gold. ( Song of Song of Solomon 5:11) And John's account of the Lord Jesus Christ is much to the same amount. ( Revelation 1:13, etc.) What sublime descriptions they all are of the glories of his person. But how infinitely short of what Christ really is!

Hastings' Dictionary of the Bible [2]

Uphaz . A supposed country or region mentioned in   Jeremiah 10:9 ,   Daniel 10:5 , as a source of gold. Probably the word is miswritten for Ophir (wh. see).

J. F. McCurdy.

Holman Bible Dictionary [3]

 Jeremiah 10:9 Daniel 10:5 1 Kings 10:18 Isaiah 13:12 Jeremiah 10:9

Smith's Bible Dictionary [4]

U'phaz.  Jeremiah 10:9;  Daniel 10:5. See Ophir .

American Tract Society Bible Dictionary [5]

A region producing fine gold,  Jeremiah 10:9   Daniel 10:5 . In Hebrew it differs from Ophir by only one letter; and it is thought to denote the same region.

Morrish Bible Dictionary [6]

Some place from whence gold was brought.  Jeremiah 10:9;  Daniel 10:5; supposed according to some ancient versions to be the same as OPHIR, q.v.

Fausset's Bible Dictionary [7]

 Jeremiah 10:9;  Daniel 10:5. Ophir, of which Uphaz is a corruption. (See Ophir .)

Easton's Bible Dictionary [8]

 Jeremiah 10:9

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [9]

(Heb. Uphaz', אוּפָז , signif. uncertain; Sept. Μωφάζ , ᾿Ωφάζ ; Vulg. Ophaz, Obryzuni ) , the name of a gold region ( Jeremiah 10:9;  Daniel 10:5), like Tarshish and Ophir (comp.  Psalms 45:10; 1 Chronicles 39:4), and hence thought by most expositors to be a corruption of the latter name (so the Targum, Syriac, and Theodotion). F Ü rst, however, suggests ( Heb. Lex. s.v.) that it may be compounded of אוּ , wash, and פָּז , pure Gold; and that since it is interchanged with Sheba ( Psalms 72:15), it may be regarded as the name of a gold wash in Southern Arabia. Its resemblance to Muphaz ( מוּפָז ; A.V. "best") in  1 Kings 10:18 is perhaps not accidental. (See Ophira).

International Standard Bible Encyclopedia [10]

ū´faz ( אוּפּז , 'ūphāz ): A gold-bearing region, mentioned in   Jeremiah 10:9;  Daniel 10:5 , otherwise unknown. Perhaps in both passages Ophir, which differs in one consonant only, should be read. In the second passage, instead of "gold of Uphaz," perhaps "gold and fine gold" ( 'ūphāz ) should be read. The Jerusalem Talmud states that there were seven kinds of gold, good gold, pure, precious, gold of Uphaz, purified, refined, and red gold of Parvaim ( 2 Chronicles 3:6 ). That of Uphaz, which is so called from the place from which it comes, resembles "flashes of fire fed with pitch" (M. Schwab, The Talmud of Jerusalem , V, 207 f).

Kitto's Popular Cyclopedia of Biblial Literature [11]

U´phaz, a country from which gold was obtained . It is generally supposed to be a corruption of Ophir.