Imam Malik's Muwatta, Chapter: Shortening the Prayer

Yahya related to me from Malik from al Ala ibn Abd ar-Rahman ibn Yaqub from his father from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, said, "Shall I tell you the things by which Allah erases wrong actions and by which he raises ranks: the complete and correct performance of wudu in adverse conditions, a great number of steps towards the mosque,and waiting after one prayer for the next prayer. That is the firm hold, that is the firm hold, that is the firm hold."