It is narrated from Hazrat Abu Ayyub Ansari (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Perform Witr with five rak‘ahs; if you cannot do this, then with three rak‘ahs; if you cannot do this either, then perform Witr with one rak‘ah; and if you cannot do even this, then perform it by gesture.