In daf yomi we recently (שבת צז א) had the statement of ריש לקיש:

החושד בכשרים לוקה בגופו

In Joshua 22, Joshua sends the 2½ tribes – ראבן גד וחצי מנשה – to the land on the east side of the Jordan that they were promised, and they immediately build an altar.  What follows is a case of mistrust on both sides of the Jordan:  The majority tribes on the west side of the Jordan suspect the the 2½ tribes have already forsaken the LORD and have built an altar to foreign Gods, while the tribes east of the Jordan fear that the majority will regard them as a foreign nation across a border and therefore felt compelled to build a symbolic altar to show their connection to the LORD and to their brethren across the Jordan.

This unfortunately presages the fighting between the tribes that we will see in שפטים and then in the actual splitting of the Kingdoms after the reign of Solomon.

The 2½ tribes use the word תבנית to describe the altar that they build, and it is probably worth investigating the 18 times in תנ”ך that this word is used.