Hadith

Allah the Exalted said, “O Son of Adam! Busy yourself in worshiping Me, and I will fill your chest with riches and dissipate your meekness. Otherwise, I will fill your chest with distracting affairs and will not do away with your meekness.”
-At-Tirmidhi and Ibn Majah

Angelology

The Messenger of Allah (may the peace and blessings of Allah be upon him) said, “Allah has angels who roam about on roads looking for the love-sick rememberers of Allah. When they find such people, they call out other angels: ‘Come here to your coveted aspiration.” (Sahih Bukhari)