New Revised Standard Version
When their breath departs, they return to the earth; on that very day their plans perish.

Contemporary English Version
Once they die and are buried, that will be the end of all their plans.

New American Bible
Who breathing his last, returns to the earth; that day all his planning comes to nothing.

Douay-Rheims Bible
His spirit shall go forth, and he shall return into his earth: in that day all their thoughts shall perish.

His spirit shall go forth, and he shall return into his earth: in that day all their thoughts shall perish.

his breath

Psalm 104:29 But if thou turnest away thy face, they shall be troubled: thou shalt take away their breath, and they shall fail, and shall return to their dust.

Genesis 2:7 And the Lord God formed man of the slime of the earth: and breathed into his face the breath of life, and man became a living soul.

Genesis 6:17 Behold, I will bring the waters of a great flood upon the earth, to destroy all flesh, wherein is the breath of life under heaven. All things that are in the earth shall be consumed.

Job 14:10 But man when he shall be dead, and stripped and consumed, I pray you where is he?

Job 17:1 My spirit shall be wasted, my days shall be shortened and only the grave remaineth for me.

Job 27:3 As long as breath remaineth in me, and the spirit of God in my nostrils,

Daniel 5:23 But hast lifted thyself up against the Lord of heaven: and the vessels of his house have been brought before thee: and thou, and thy nobles, and thy wives, and thy concubines, have drunk wine in them: and thou hast praised the gods of silver, and of gold, and of brass, of iron, and of wood, and of stone, that neither see, nor hear, nor feel: but the God who hath thy breath in his hand, and all thy ways, thou hast not glorified.

he returneth

Psalm 90:3 Turn not man away to be brought low: and thou hast said: Be converted, O ye sons of men.

Genesis 3:19 In the sweat of thy face shalt thou eat bread till thou return to the earth out of which thou wast taken: for dust thou art, and into dust thou shalt return.

Ecclesiastes 12:7 And the dust return into its earth, from whence it was, and the spirit return to God, who gave it.

his thoughts

Job 14:21 Whether his children come to honour or dishonour, he shall not understand.

Job 17:11 My days have passed away, my thoughts are dissipated, tormenting my heart.

Isaiah 2:22 Cease ye therefore from the man, whose breath is in his nostrils, for he is reputed high.

Lamentations 4:20 Res. The breath of our mouth, Christ the Lord, is taken in our sins: to whom we said: Under thy shadow we shall live among the Gentiles.

1 Corinthians 2:6 Howbeit we speak wisdom among the perfect: yet not the wisdom of this world, neither of the princes of this world that come to nought.