so that what was spoken by Isaiah the prophet would be fulfilled: ¹ 

This fulfilled what was spoken by Isaiah the prophet: ¹ 

In this way what was spoken by Isaiah the prophet was fulfilled: ¹  “He took our weaknesses and carried our diseases.” ² 

and the scroll of the prophet Isaiah was given to him. He ¹  unrolled ²  the scroll and found the place where it was written,

so that the word ¹  of Isaiah the prophet would be fulfilled. He said, ²  “Lord, who has believed our message, and to whom has the arm of the Lord ³  been revealed?” ⁴ 

For he is the one about whom Isaiah the prophet had spoken: ¹  “The voice ²  of one shouting in the wilderness, ‘Prepare the way for the Lord, make ³  his paths straight.’” ⁴ 

And concerning them the prophecy of Isaiah is fulfilled that says: ‘You will listen carefully ¹  yet will never understand, you will look closely ²  yet will never comprehend.

As it is written in the book of the words of Isaiah the prophet, “The voice ¹  of one shouting in the wilderness: ²  ‘Prepare the way for the Lord, make ³  his paths straight.

So they began to leave, ¹  unable to agree among themselves, after Paul made one last statement: “The Holy Spirit spoke rightly to your ancestors ²  through the prophet Isaiah