The regime of silence started as of 7:00 pm local time Monday and will last till Sept. 19, the army said in a statement.
Still, the army said it reserves the right to respond to any breach by the rebels.
The military ceasefire declaration comes as part of the recent deal between superpowers.
The United States and Russia early Saturday announced a landmark agreement on a nationwide ceasefire in Syria, which would commence with the start of the Muslim holiday of Eid al-Adha.
The week-long truce also includes improving humanitarian aid access and a joint military operation against banned terrorist groups.
All attacks and airstrikes will be stopped and unobstructed access will be allowed to besieged areas, including the northern city of Aleppo, according to the truce.
The Syrian government said it welcomes the deal.
Source: Xinhua/News Ghana