I’ve blogged the tune ELLACOMBE elsewhere and have had recent liturgies posted here with other texts for this tune.
“I (or We) Sing the Almighty Power of God” is by Isaac Watts and the text and sheet music is at Hymnary.
“The Day of the Resurrection” is by John of Damascus (trans. John Mason Neale) and my copy is in Together in Song No 361, but you can also find the text and sheet music at Hymnary.
Wow.