When anyone of you prays two Rak‘ahs before the dawn prayer, he should lie on his right side

Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "When anyone of you prays two Rak‘ahs before the dawn prayer, he should lie on his right side." Marwān ibn al-Hakam said to him: "Is it not enough that one of us walks to the mosque until he lies on his right side?" According to the version of ‘Ubaydullāh, he (Abu Hurayrah) replied: 'No.' This statement (of Abu Hurayrah) reached Ibn ‘Umar. He said: "Abu Hurayrah exceeded the limits on himself." He was asked: "Do you approve of what he says?" He replied: "No, but he dared and we showed cowardice." This (criticism of Ibn ‘Umar) reached Abu Hurayrah. He said: "What is my sin if I committed it to memory but they forgot?"