I don't think the translation is done correctly. The correct translation is " when one of my Sikhs can fight 125,000 people only then can I be referred to as Sri Guru Gobind Singh Ji."
It is mentioned in Chamkur Sahib all the Singhs took on impossible numbers. Because of the ratio of fighters the battle of Chamkur Sahib reminds me of the famous Spartan battle of Thermopylae. These Singhs had such an amazing spirit.
I think this pangti comes from Bhai Nand Lal Singh Jis writings. When I have time I will double check.