Easton's Bible Dictionary (1897)
A gift, a station of the Israelites (Num. 21:18, 19) between the desert and the borders of Moab, in the Wady Waleh.
Smith's Bible Dictionary (1863)
(gift of Jehovah), a station the latter part of the wandering of the Israelites. (Numbers 21:18,19) It was probably situated to the southeast of the Dead Sea.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
MAT'TANAH (gift, present), a station of the Hebrews between the desert and the borders of Moab. Num 21:18-19. Maschana, on the Arnon, 12 miles from Dibon, has been suggested as marking Mattanah.