Jesus said to his disciples: “If you bring your gift to the altar, and there recall that your brother has anything against you, leave your gift there at the altar, go first and be reconciled with your brother, and then come and offer your gift.” (Mt 5:20-26)
https://bible.usccb.org/bible/readings/030323.cfm
I will never the forget the Maronite priest I met on retreat who told the story of celebrating the Sunday liturgy and having read this particular gospel, left his congregation praying in the church and went to the rectory to call his brother, made peace, and then returned to the church to finish the liturgy.