Reference: Tirzah (2)
Fausets
A Canaanite city whose king was one of the 31 subdued by Joshua (Jos 13:24). The royal residence of the kings of Israel from Jeroboam to Omri, who removed the capital to Samaria (1Ki 14:17; 15:21; 16:6,17-18); Baasha was buried here. Zimri was besieged here by Omri, and perished in the flames of the palace. Menahem who smote Shallum "went up from Tirzah" (2Ki 15:14,16), but when reigning made Samaria his capital.
Celebrated for beauty (Song 6:4); some derive Tirzah from ratsah, "pleasant." Its mention is no ground for assigning the Song to a date later than Solomon, as it was in his time the chief city of northern Israel as Jerusalem of southern Israel. The church is "a city set on an hill" (Mt 5:14), "well pleasing" to God (Heb 13:21). In the middle ages Brocardus mentions a Thersa on a height three leagues E. of Samaria; this is the exact position of Telluzah, in the mountains N. of Nablus, a large flourishing town, precipitous toward the E. and accessible from the W.; without remains of antiquity; a corruption probably of Tirzah.
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Smith
Tir'zah,
an ancient Canaanite city, whose king is enumerated among those overthrown in the conquest of the country.
It reappears as a royal city, the residence of Jeroboam and of his successors,
and as the seat of the conspiracy of Menahem ben-Gaddi against the wretched Shallum.
Its reputation for beauty throughout the country must have been widespread. It is in this sense that it is spoken of in the Song of Solomon. Eusebius mentions it in connection with Menahem, and identifies it with a "village of Samaritans in Batanea." Its site is Telluzah, a place in the mountains north of Nablus.