Sikhism is a religion which believes in and preaches "One God". It is a religion based upon Guru - Disciple tradition. In its literal sense the disciples of a Guru are referred to as "Shishya" (in Hindi) or "Sikh" (in Punjabi). However the followers of Sikhism are known as Sikhs. Sikhism originated in the 15th century and Guru Nanak Dev ji is considered the first Guru and the founder of this religion.
Supreme God / Supreme Being in Sikhism - Akal Purukh
Guru Nanak Dev Ji is known to have gone to Sachkhand (Eternal Place of the Supreme Lord) and seen the Supreme Lord there. A True Guru took Guru Nanak Dev Ji to Sachkhand after Guru Nanak Dev Ji entered in to River Bein. On returning from Sachkhand Guru Nanak Dev Ji gave the eye witness account of the True Lord (Satpurush) he saw in Sachkhand. Most of the Banis of Guru Nanak Dev Ji have been recorded under Pehla Mehla (First Mehla) in Shri Guru Granth Sahib.
God Kabir in Shri Guru Granth Sahib
The Supreme God is addressed as "Sat Purukh" (True God) or "Akal Purukh" (Immortal God) by Sikhs. Guru Nanak Dev Ji has described this Supreme God as "Hakka Kabir" (True Kabir) in his Bani in Shri Guru Granth Sahib on Page 721 in Rag Tilang Mehla 1 and on Page 24 in Rag Siri Mehla Pehla
Rag Tilang Mehla Pehla - Sri Guru Granth Sahib Page 721
ਯਕ ਅਰਜ ਗੁਫਤਮ ਪੇਸਿ ਤੋ ਦਰ ਗੋਸ ਕੁਨ ਕਰਤਾਰ ॥
ਹਕਾ ਕਬੀਰ ਕਰੀਮ ਤੂ ਬੇਐਬ ਪਰਵਦਗਾਰ ॥੧॥
Guru Nanak Dev ji is saying, I offer this one prayer to You; please listen to it, O Creator Lord.
True Kabir, you are merciful and spotless Supreme Lord.
