Sunan Abu Dawud
1472
Sahih Maqtu+2

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

Sahih MaqtuAl-Albani
Sahih MaqtuMuhammad Muhyi Al-Din Abdul Hamid