Pakislam.com
Prayer-Salat
The second pillar of Islam is Salah, the requirement to pray five times a day at fixed times.The time of day to pray are at dawn, noon, mid-afternoon, sunset, and night fall. Each salah is performed facing towards the Kaaba in Makkah. Salat is intended to focus the mind on Allah; it is seen as a personal communication with Allah, expressing gratitude and worship. According to the Qur'an, the benefit of prayer "restrains [one] from shameful and evil deeds".[Qur'an 29:40]

Salah is compulsory but some flexibility in the specifics is allowed depending on the circumstances. For example, in the case of sickness or a lack of space, a worshipper can offer salah while sitting, or even lying down, and the prayer can be shortened when travelling. The salah must be performed in the Arabic language to the best of each worshipper's ability. If s/he cannot speak Arabic, then his/her native language can be used. The lines of prayer are to be recited by heart (although beginners may use written aids), and the worshipper's body and clothing, as well as the place of prayer, must be cleansed.