In The Name of Allaah, The Most Merciful, The Bestower of Mercy.

Ibn Mas’ood said:

“I dislike to see a man being idle- neither (occupied) with beneficial affairs of the dunya, nor deeds of the Aakhira”. [Ref 1]

He [radiyallaahu-anhu] said:

“[There] are two affairs that are destructive- Self-amazement and despairing of Allaah’s Mercy”. [Ref 2]

He [radiyallaahu-anhu] said:

“Acquire knowledge before it is taken away and it being taken away is the departure of its people (i.e. the death of the scholars). Indeed, beware of [التنَطُّع  (i.e. going beyond what Allaah has legislated with regards to one’s practice of the religion); التعمُّق (i.e. looking too deeply into affairs in a manner that leads a person to overstep the boundaries of the legislation) and  بدع  (innovation in religion). And upon you is (to hold onto the) ancient affair (i.e. the way of the Salaf)”. [Ref 3]

Ref 1: Al- Fawaaid page 213; Ref 2: Hilyatul Awliyaa 7/298; Ref 3: Reported by Bayhaqiy (rahimahullaah) in Al-Madkhal Ilaa As-Sunan Al-Kubraa Number: 387; Ad-Daarimiy (rahimahullaah) in As-Sunan 1/54; Ibn Abdul Barr (rahimahullaah) in Jaami Bayaan al-Ilm 1/152; Al-Khateeb (rahimahullaah) in Al-Faqeeh Wal-Mutafaqqih 1/43