1 Chronicles 6:4 names Phinehas as Eleazar's son, directly linking to his identity as the ruler over gatekeepers in the main verse.

1 Chronicles 6:50 continues the Aaronic line through Phinehas, confirming his priestly ancestry behind his role.

Num 25:11-13 recounts Phinehas' zealous act and the covenant of peace, explaining why he was ruler in 1 Chron 9:20.

Num 31:6 shows Phinehas leading in battle, providing an example of his leadership role stated in 1 Chron 9:20.

Num 3:32 states Eleazar was chief over the Levites—the father of Phinehas, who later became ruler as in 1 Chron 9:20.