Answering the call to prayer
appropriately reference this quote to: www.fatwa-online.com,
If the call to prayer was made and Ibraaheem ibn Maymoon al-Marwazee had raised his hammer, he would not strike with it (i.e. he would immediately stop work), [and instead go and answer the call to prayer].
al-Hilyah - Volume 6 / Page 239