Mishkat al-Masabih #278

A man of the B. Sulaim said: God's messenger counted them in my hand, or in his hand, saying, “The glorifying of God is half the scale, ‘Praise be to God’ fills it, ‘God is most great’ fills the space between heaven and earth, fasting is the half of endurance, and being purified is half of faith.” Tirmidhi transmitted it and said that this is a hasan tradition.