Smith's Bible Dictionary

Shittim (the acacias), the place of Israel’s encampment between the conquest of the transjordanic highlands and the passage of the Jordan. (Numbers 25:1; Numbers 33:49; Joshua 2:1; Joshua 3:1; Micah 6:5) Its full name appears to be given in the first of these passage --Abel has-Shittim, "the meadow, or moist place, of the acacias." it was "in the Arboth-moab, by Jordan-Jericho," (Numbers 22:1; Numbers 26:3; Numbers 31:12; Numbers 33:48 , Numbers 49 That is to say, it was in the Arabah or Jordan valley, opposite Jericho.