In the Dasam Granth, the Sikh Scripture, there is mention of twenty-four incarnations; but generally ten are mentioned : Four of Satyuga (or Krityayuga) viz. Matsya (Fish), Kurma (Tortoise), Varaha (Boar) and Narsingh (Man-lion); Three of Treta Yuga viz. Vamana (Dwarf), Parashurama and Rama; One of Dwapara Yuga i.e. Krishna and Two of Kaliyuga viz. Buddha and the forthcoming Kalki. Guru Granth Sahib rejects the worship of gods and their incarnations, because they are all the created beings and also prone to death. It lays emphasis on the worship of the Transcendental Brahman (Nirguna), Who is Immortal and Infinite.
References :
1. Kohli, Surindar Singh, Dictionary of Mythological References in Guru Granth Sahib, 1993