This sounds easy enough to prove: just what chapter and verse are you talking about?
Isaiah 22.20 And it shall come to pass in that day, that I will call my servant Eliacim the son of Helcias,
21 And I will clothe him with thy robe, and will strengthen him with thy girdle, and will give thy power into his hand: and he shall be as a father to the inhabitants of Jerusalem, and to the house of Juda.
22 And I will lay the key of the house of David upon his shoulder: and he shall open, and none shall shut: and he shall shut, and none shall open.
23 And I will fasten him as a peg in a sure place, and he shall be for a throne of glory to the house of his father.
24 And they shall hang upon him all the glory of his father's house, divers kinds of vessels, every little vessel, from the vessels of cups even to every instrument of music.
25 In that day, saith the Lord of hosts, shall the peg be removed, that was fastened in the sure place: and it shall be broken and shall fall: and that which hung thereon, shall perish, because the Lord hath spoken it.
St. Matthew 16.16 Simon Peter answered and said: Thou art Christ, the Son of the living God.
17 And Jesus answering said to him: Blessed art thou, Simon Bar-Jona: because flesh and blood hath not revealed it to thee, but my Father who is in heaven.
18 And I say to thee: That thou art Peter; and upon this rock I will build my church, and the gates of hell shall not prevail against it.
19 And I will give to thee the keys of the kingdom of heaven. And whatsoever thou shalt bind upon earth, it shall be bound also in heaven: and whatsoever thou shalt loose on earth, it shall be loosed also in heaven.
St. Luke 12.35 Let your loins be girt and lamps burning in your hands.
36 And you yourselves like to men who wait for their lord, when he shall return from the wedding; that when he cometh and knocketh, they may open to him immediately.
37 Blessed are those servants whom the Lord, when he cometh, shall find watching. Amen I say to you that he will gird himself and make them sit down to meat and passing will minister unto them.
38 And if he shall come in the second watch or come in the third watch and find them so, blessed are those servants.
39 But this know ye, that if the householder did know at what hour the thief would come, he would surely watch and would not suffer his house to be broken open.
40 Be you then also ready: for at what hour you think not the Son of man will come.
41 And Peter said to him: Lord, dost thou speak this parable to us, or likewise to all?
42 And the Lord said: Who thinkest thou is the faithful and wise steward, whom his lord setteth over his family, to give them their measure of wheat in due season?
43 Blessed is that servant whom, when his lord shall come, he shall find so doing.
44 Verily I say to you, he will set him over all that he possesseth.