The elders blessed Ruth to be like which two women who built up the house of Israel?

Answer: Rachel and Leah

At the gate the elders said, "May the LORD make the woman entering your home like Rachel and Leah, who together built up the house of Israel."

““We are witnesses,” said the elders and all the people at the gate. “May the LORD make the woman entering your home like Rachel and Leah, who together built up the house of Israel. May you be prosperous in Ephrathah and famous in Bethlehem.”— Ruth 4:11 (BSB)