The Holy Spirit will teach you what Jesus wants you to say.

“Go with the men, but only the word that I speak to you, that you shall speak.” (Num 22:34)
“Therefore, whatever I speak, just as the Father has told Me, so I speak.” (Jn 12:50)
“But the Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you.” (Jn 14:26)
“For the Holy Spirit will teach you in that very hour what you ought to say.” (Lk 12:12)
“It is the Spirit who gives life; the flesh profits nothing. The words that I speak to you are spirit, and they are life.” (Jn 6:63)
“I have many things to say and to judge concerning you, but He who sent Me is true; and I speak to the world those things which I heard from Him.” (Jn 8:26)
“When you lift up the Son of Man, then you will know that I am He, and that I do nothing of Myself; but as My Father taught Me, I speak these things.” (Jn 8:28)
“I speak what I have seen with My Father” (Jn 8:38)
“The words that I speak to you I do not speak on My own authority; but the Father who dwells in Me does the works.” (Jn 14:10)
“These things we also speak, not in words which man’s wisdom teaches but which the Holy Spirit teaches, comparing spiritual things with spiritual.” (1Cor 2:13)
“Even so no one knows the things of God except the Spirit of God.” (1Cor 2:11)
“Now we have received, not the spirit of the world, but the Spirit who is from God, that we might know the things that have been freely given to us by God.” (1Cor 2:12)
“These things we also speak, not in words which man’s wisdom teaches but which the Holy Spirit teaches, comparing spiritual things with spiritual.” (1Cor 2:13)
“But the natural man does not receive the things of the Spirit of God, for they are foolishness to him; nor can he know them, because they are spiritually discerned.” (1Cor 2:14)
“For who has known the mind of the LORD that he may instruct Him? But we have the mind of Christ.” (1Cor 2:16)
Reading: Num 22-24; Matt 12