Hadith 913
Sayyiduna Abu Dharr (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "When any one of you stands in prayer, the mercy of Allah turns towards him, so he should not touch the pebbles." Abdul Jabbar added that Sa‘d bin Ibrahim asked him, "Who is Abu Al-Ahwas?" He replied, "You have seen that elder who has these and these qualities."
Hadith 914
Sayyiduna Abu Dharr (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "When any one of you stands in prayer, the mercy of the Lord turns towards him, so do not move the pebbles." (Do not turn your attention to things other than the prayer.)