Genesis 38:1

And it came to pass at that time, that Judah went down from his brethren, and turned in to a certain Adullamite, whose name was Hirah.

Cross-reference

In Genesis 46:12, Judah's sons Er and Onan are listed as having died in Canaan — the same sons born to him from the Shuaite woman mentioned here.

Joshua 15:35 lists Adullam as a city in Judah's tribal allotment — showing the place later became part of his tribe's inheritance.

In Numbers 26:19, Er and Onan are again recorded as having died in Canaan, confirming the genealogical note from Judah's family here.