What if you could get more reward than praying from Tahhujud (before Fajr) until Duhr with a single short dua?
Dua told to Aisha (RA) that would be heavier than praying from Tahhujud until Duhr:
Arabic Transliteration: “Subhan’Allah wabi hamdihi, Ad’hadha Khalkihi, wa’rida a’nafsihi, wa’zenath arshi’hi, wa’midada’kalimathi’hi”
Ibn `Abbas reported from Juwayriyah that the Prophet (peace be upon him) came out early when he offered the Subh [Morning] Salah while Aisha was in her praying place. Then he returned after the forenoon while she was sitting. Thereupon, he said: “Are you still in the same position as I left you. I replied in the affirmative. Thereupon, the Prophet said: I recited four words three times after I had left you. If these are to be weighed against all you have recited since morning, these will be heavier. These are: Subhan-Allahi Wa Bihamdihi, `Adada Khalqihi, Wa Rida Nafsihi, Wa Zinatah `Arshihi, Wa Midada Kalimatihi [Allah is free from imperfection and I begin with His praise, as many times as the number of His creatures, in accordance with His Good Pleasure, equal to the weight of His Throne and equal to the ink that may be used in recording the words (for His Praise)].”