Question: O Eminent
Shaykh, a man praying Salaatul-Dhuhr drops his handkerchief while he is
standing so he bends down and grabs the handkerchief, is his prayer invalidated
by this movement?
Answer: Yes, his prayer is
invalidated by this movement; because when he makes Rukoo he bends down until
he reaches the point of the Rukoo, but he has (now) increased the Rukoo (i.e.
gone past the Rukoo point to grab his handkerchief or added another Rukoo). However,
if he has done so out of ignorance then there is nothing upon him due to the
generality of His, Exalted be He, statement: Our Lord, punish us not if we
forget or fall into error. [Sooratul-Baqarah 2: 286] Due to this, if you drop a
handkerchief or key while you are standing in prayer then leave it until you
reach it in sujood or pick it up with your foot. If you are able to stand on
one foot, then get it with your foot then grab it (from your foot) with your
hand. As for the person bending down to grab it from the ground wherein the
rukoo would be closer to it than the qiyaam, then this is not permissible.
Shaykh Muhammad bin Saalih al-'Uthaymeen Translated by Raha Azeezuddeen Batts
http://sahab.net/forums/showthread.php?t=372233
Source: http://fatwaislam.com/fis/index.cfm?scn=fd&ID=1392
