Verses with the word masters in the Old Testament (5 verses):

Psalms 123:2
Behold, as the eyes of servants look unto the hand of their masters, and as the eyes of a maiden unto the hand of her mistress; so our eyes wait upon the LORD our God, until that he have mercy upon us.

Proverbs 25:13
As the cold of snow in the time of harvest, so is a faithful messenger to them that send him: for he refresheth the soul of his masters.

Ecclesiastes 12:11
The words of the wise are as goads, and as nails fastened by the masters of assemblies, which are given from one shepherd.

Jeremiah 27:4
And command them to say unto their masters, Thus saith the LORD of hosts, the God of Israel; Thus shall ye say unto your masters;

Amos 4:1
Hear this word, ye kine of Bashan, that are in the mountain of Samaria, which oppress the poor, which crush the needy, which say to their masters, Bring, and let us drink.