Psalm 39:3-5

Amplified Bible

³ 
My heart was hot within me.
While I was musing the fire burned;
Then I spoke with my tongue:
⁴ 
“Lord, let me know my [life’s] end
And [to appreciate] the extent of my days;
Let me know how frail I am [how transient is my stay here].
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“Behold, You have made my days as [short as] hand widths,
And my lifetime is as nothing in Your sight.
Surely every man at his best is a mere breath [a wisp of smoke, a vapor that vanishes]!^(A) Selah.