Cross reference
Ecclesiastes 8:16
16 When I gave my heart to know wisdom and to see the business that hath been done on the earth, (for there is also a spectator in whose eyes sleep is not by day and by night),
Psalms 127:2
2 Vain for you who are rising early, Who delay sitting, eating the bread of griefs, So He giveth to His beloved one sleep.
Ecclesiastes 1:13
13 And I have given my heart to seek and to search out by wisdom concerning all that hath been done under the heavens. It `is' a sad travail God hath given to the sons of man to be humbled by it.
Ecclesiastes 2:23
23 For all his days are sorrows, and his travail sadness; even at night his heart hath not lain down; this also `is' vanity.
Genesis 31:40
40 I have been `thus': in the day consumed me hath drought, and frost by night, and wander doth my sleep from mine eyes.
Ecclesiastes 4:8
8 There is one, and there is not a second; even son or brother he hath not, and there is no end to all his labour! His eye also is not satisfied with riches, and `he saith not', `For whom am I labouring and bereaving my soul of good?' This also is vanity, it is a sad travail.
Ecclesiastes 5:12
12 Sweet `is' the sleep of the labourer whether he eat little or much; and the sufficiency of the wealthy is not suffering him to sleep.
Ecclesiastes 7:25
25 I have turned round, also my heart, to know and to search, and to seek out wisdom, and reason, and to know the wrong of folly, and of foolishness the madness.
Ecclesiastes 8:7
7 For he knoweth not that which shall be, for when it shall be who declareth to him?
Ecclesiastes 8:9
9 All this I have seen so as to give my heart to every work that hath been done under the sun; a time that man hath ruled over man to his own evil.