הוּא hu' "he/him, it" not usually expressed where it is the subject of the verb, except for emphasis. See: Am 1:15; 5:18; 7:2, 5, 13. Or with the sign of definiteness in phrases like "on that day" בַּיּוֹם הַהוּא bayom hahu: Am 2:16; 8:3, 9, 13; 9:11.

Cf. הִיא hi' "she/her, it" as in Am 5:13;  7:6.