Did it reach us from Imam Abu Hanifah that he would stand in night prayer for 20 years, and that Imam Ahmad would pray 300 rak'ahs in a day and night?

Question:
He says: Honorable Shaykh, may Allah grant you success. We often hear that Imam Abu Hanifah (may Allah have mercy on him) used to stand in prayer for the entire night for a period of 20 years, and that Imam Ahmad (may Allah have mercy on him) used to pray 300 rak'ahs in a day. He asks: Is this practice authentic from them? Is it established? And did it come from the Prophet (peace and blessings be upon him)?

Answer:
This is difficult for us because we are lazy and have become accustomed to laziness. As for those scholars, Allah helps them. This is among their karamah (miracles granted to a righteous person); Allah helps them with it, and they preserve their time by doing so. So do not be surprised by this from them, may Allah have mercy on them. Imam Abu Hanifah (may Allah have mercy on him) is known for his wara' (scrupulousness), standing in night prayer, and the abundance of his acts of obedience. This is well known about him, may Allah have mercy on him. Yes, and so is Imam Ahmad, and other Imams besides them. But laziness and lethargy have overcome us, so we find these matters strange or deny them because we measure them by our own conditions. There is a difference between us and them. It is not correct to say that if a person walks, he is like a seated person. Do not attribute our state to them. It is not correct to say that if a person walks, he is like a seated person. Yes.