Attached to the hem of the priest's robe
And beneath upon the hem of it thou shalt make pomegranates of blue, and of purple, and of scarlet, round about the hem thereof; and bells of gold between them round about: A golden bell and a pomegranate, a golden bell and a pomegranate, upon the hem of the robe round about. (Exodus 28:33-34)
And they made bells of pure gold, and put the bells between the pomegranates upon the hem of the robe, round about between the pomegranates; A bell and a pomegranate, a bell and a pomegranate, round about the hem of the robe to minister in; as the Lord commanded Moses. (Exodus 39:25-26)
On horses
In that day shall there be upon the bells of the horses, HOLINESS UNTO THE LORD; and the pots in the Lord's house shall be like the bowls before the altar. (Zechariah 14:20)