EXOD1060 We should take special care not to quarrel or grow angry on or before Shabbos. The Shaloh wrote that besides the literal meaning of the words, this verse also alludes to the fire of anger and disputes. On Shabbos a person should be especially careful not to grow angry or become involved in disputes. (Shnay Luchos Habris, part 3, p. 119). Rabbi Eliyahu Lopian wrote in a list of regulations for his yeshiva that everyone should be careful not to speak angrily on Friday and Shabbos. He added that ideally a person should never feel angry; someone who nonetheless feels angry, should at least not speak out of anger. On Friday, in the rush to finish the Shabbos preparations on time, a person is apt to become short tempered. Also, on Shabbos when the entire family sits at the table together, parents might become angry with their young children for not behaving properly. Therefore, special care should be taken to control one's anger. (Lev Eliyahu, vol. 1, p. 304).