I'll just go and freshen up before supper.

晚饭前我要去梳洗打扮一番。

《牛津词典》

One evening before supper, the father noticed his son playing with a piece of wood on the floor.

一天晚饭前，父亲注意到儿子在地板上玩一块木头。

youdao

The mother said she would let off her son washing the dishes if he could finish his assignment before supper.

母亲说如果儿子能在晚饭前完成作业，她就不让他洗碗。

youdao

The rite re-enacts Jesus' washing of the feet of his 12 apostles during the Last Supper before his crucifixion, a sign of his love and service to them.

NPR: Pope's Foot-Wash A Final Straw For Traditionalists

The Christian ritual takes place on the Thursday before Easter to commemorate Christ's Last Supper.

BBC: Pope Francis washes prisoners' feet on Maundy Thursday

At the latter, a short menu of plump dumplings, noodle dishes and street food is cooked by Beijing-born Ning Ma, whose amateur supper club grew out of her living room before becoming a professional restaurant.

BBC: Brixton sheds its shady side