Waki' and Ibn 'Uyainah said (explaining the meaning of taghanni):

This means that the Qur'an makes a man neglect all other things, and be content with it.

حَدَّثَنَا مُحَمَّدُ بْنُ سُلَيْمَانَ الأَنْبَارِيُّ، قَالَ قَالَ وَكِيعٌ وَابْنُ عُيَيْنَةَ يَعْنِي يَسْتَغْنِي بِهِ ‏.‏