Ecclesiastes 12:1-5 elaborates on the 'days of darkness' from 11:8, describing old age and loss of pleasure—a direct follow-up.

Ecclesiastes 8:15 commends joy as the best thing under the sun—the same message as the opening of 11:8.

Ecclesiastes 2:1-11 recounts the Teacher's pursuit of pleasure ending in vanity, directly supporting the 'all is vanity' conclusion here.

Ecclesiastes 2:1-11 shows the futility of worldly joy, reinforcing the vanity that accompanies the 'days of darkness' reminder.

Ecclesiastes 2:17 expresses hatred of life and sees all as vanity, contrasting sharply with 11:8's call to rejoice in many years.

Ecclesiastes 7:14 pairs joy in prosperity with considering adversity—mirroring 11:8's call to rejoice while remembering days of darkness.

Ecclesiastes 6:6 underscores that a long life without enjoyment is futile, reinforcing the call to rejoice in 11:8.

Ecclesiastes 3:12 echoes the call to joy: there is nothing better than being joyful and doing good—the same imperative as in 11:8.

Ecclesiastes 3:13 reinforces that enjoying life's simple pleasures is God's gift—the same theme of rejoicing in 11:8.

Ecclesiastes 5:15 states we leave the world as we came—naked—reinforcing 11:8's reminder of inevitable darkness.

Ecclesiastes 5:16 calls toil 'grievous evil' and 'for the wind,' amplifying 11:8's vanity theme with a darker perspective.

Ecclesiastes 5:18-20 expands on rejoicing in toil as God's gift, and says God fills with joy so one doesn't dwell on troubles—complementing 11:8.

Ecclesiastes 12:2 elaborates on the 'days of darkness' from 11:8, describing the darkening of sun, moon, and stars as symbols of old age.

Ecclesiastes 1:2 declares 'all is vanity,' the foundational statement that 11:8 echoes by concluding 'all that comes is vanity.'

Ecclesiastes 2:21-23 describes toil as grief and pain, contrasting with 11:8's joy, yet both affirm life's vanity.

Ecclesiastes 2:19 laments that toil is left to an unknown heir, echoing 11:8's theme of vanity but without the call to rejoice.

Ecclesiastes 8:12 adds that even sinners may prolong life, but the righteous fare well—contrasting the general vanity in 11:8 with moral distinction.

Ecclesiastes 6:11 questions the profit of many words, while 11:8 questions the profit of many years—both underscore futility.

Joel 2:2 describes a 'day of darkness' as a coming judgment — broadening the personal 'days of darkness' here to a communal event.

John 12:35 urges walking while the light remains — directly paralleling the call here to remember darkness before it comes.

Jeremiah 13:16 warns of darkness and stumbling when glory is not given — expanding 'days of darkness' to include divine judgment.

Job 18:18 depicts being driven from light into darkness — a vivid picture of the 'days of darkness' mentioned here as removal from life.

Matthew 22:13 uses 'outer darkness' for final punishment — a NT echo of the darkness theme, emphasizing its severity beyond death.

Deuteronomy 32:29 wishes Israel were wise to discern their end—echoing 11:8's call to remember the days of darkness as part of wisdom.