On 9 August 1956, more than 50,000 women staged a march on the Union Buildings in Pretoria to protest against the proposed amendments to the Urban Areas Act (commonly known as the pass laws) of 1950. They left bundles of petitions containing more than 100 000 signatures at prime minister J.G. Strijdom's office doors. Outside they stood silently for 30 minutes, many with their children on their backs. The women sang a protest song that was composed in honour of the occasion: Wathint'Abafazi Wathint'imbokodo!(Now you have touched the women, you have struck a rock.). In the 54 years since, the phrase (or its latest incarnation: "you strike a woman, you strike a rock") has come to represent women's courage and strength in South Africa.