Tafsir of An-Naba' 78:36

Rewarded from your Lord with a sufficient gift. meaning, `this that We have mentioned to you is what Allah will reward them with, and they will be given it by His favor and from Him. It will be a kindness, mercy, gift, and recompense from Him. It will be sufficient, suitable, comprehensive and abundant.' The Arabs say, "He gave me and he sufficed me.'' This means that he sufficiently provided for me.'' From this comes the saying, "Allah is sufficient for me.''