Being ungrateful for the blessings and not treating the God-given blessings in a thankful way, will cause the straitening and decrease in the blessings and will be followed by Allah’s torment and displeasure: ‘…And if you are ungrateful, My chastisement is truly severe… Source: AT-TAWHID OR MONOTHEISM | AYATOLLAH MISBAH YAZDI (D)