Mhubiri 8 : 16 Ecclesiastes chapter 8 verse 16

Mimi nilipotia moyo wangu katika kuijua hekima, na kuuona utumishi uliofanyika juu ya nchi, (maana kuna asiyepata usingizi kwa macho yake mchana wala usiku);
soma Mlango wa 8

When I applied my heart to know wisdom, and to see the business that is done on the earth (for also there is that neither day nor night sees sleep with his eyes),