Reference: Siyar A’laam an-Nubalaa – Volume 6, Page 385
‘Umar ibn Dharr said:
O people who sin against Allaah, do not be misled by the extent of Allaah’s Gentleness over you, [rather] be aware of His Anger, for indeed He says:
{And when they angered Us, We took retribution from them…} – soorah az-Zukhruf, aayah 55