New Revised Standard Version
So Philip ran up to it and heard him reading the prophet Isaiah. He asked, “Do you understand what you are reading?”

Contemporary English Version
Philip ran up close and heard the man reading aloud from the book of Isaiah. Philip asked him, "Do you understand what you are reading?"

New American Bible
Philip ran up and heard him reading Isaiah the prophet and said, “Do you understand what you are reading?”

Douay-Rheims Bible
And Philip running thither, heard him reading the prophet Isaias. And he said: Thinkest thou that thou understandest what thou readest?

And Philip running thither, heard him reading the prophet Isaias. And he said: Thinkest thou that thou understandest what thou readest?

ran thither.

Acts 8:27 And rising up, he went. And behold, a man of Ethiopia, an eunuch, of great authority under Candace the queen of the Ethiopians, who had charge over all her treasures, had come to Jerusalem to adore.

Psalm 119:32 I have run the way of thy commandments, when thou didst enlarge my heart.

Ecclesiastes 9:10 Whatsoever thy hand is able to do, do it earnestly: for neither work, nor reason, nor wisdom, nor knowledge shall be in hell, whither thou art hastening.

John 4:34 Jesus saith to them: My meat is to do the will of him that sent me, that I may perfect his work.

Understandest.

Matthew 13:19,23,51 When any one heareth the word of the kingdom, and understandeth it not, there cometh the wicked one, and catcheth away that which was sown in his heart: this is he that received the seed by the way side. . . .

Matthew 15:10 And having called together the multitudes unto him, he said to them: Hear ye and understand.

Matthew 24:15 When therefore you shall see the abomination of desolation, which was spoken of by Daniel the prophet, standing in the holy place: he that readeth let him understand.

Mark 13:14 And when you shall see the abomination of desolation, standing where it ought not (he that readeth let him understand): then let them that are in Judea flee unto the mountains.

Luke 24:44-45 And he said to them: These are the words which I spoke to you while I was yet with you, that all things must needs be fulfilled which are written in the law of Moses and in the prophets and in the psalms, concerning me. . . .

John 5:39 Search the scriptures: for you think in them to have life everlasting. And the same are they that give testimony of me.

1 Corinthians 14:19 But in the church I had rather speak five words with my understanding, that I may instruct others also: than ten thousand words in a tongue.

Ephesians 5:17 Wherefore, become not unwise: but understanding what is the will of God.

Revelation 13:18 Here is wisdom. He that hath understanding, let him count the number of the beast. For it is the number of a man: and the number of him is six hundred sixty-six.