More about him: https://www.franciscanmedia.org/saint-of-the-day/saint-john-of-capistrano

I will rejoice in the Lord,
And I will joy in God my Jesus.
The Lord God is my strength.
Rejoice to God our helper,
Sing aloud to the God of Jacob.

Glory be to the Father …

I will rejoice in the Lord,
And I will joy in God my Jesus.
The Lord God is my strength.
The Lord is my strength and my praise,
And He is become salvation to me.
He is my God, and I will glorify Him.
The Lord is a man of war,
Almighty is His Name.
The Lord Who breaketh battles,
the Lord is His Name.

They sang to Thy holy Name, O Lord,
And they praised Thy victorious Hand.
St. John Capistrano called upon the most high Sovereign,
When the enemies assaulted him on every side,
And the great and holy God heard him.

O Lord, look mercifully upon our penances,
Regard with mercy our fasting, prayer, and almsgiving,
that through the intercession
of St. John Capistrano, Thy confessor,
they may break the snares of our enemies
and establish us securely in Thy safe keeping.

(Alma Redemptoris Mater:)
Mother benign of our redeeming Lord,
Star of the sea and portal of the skies,
Unto thine fallen people help afford,
Fallen, but striving anew to rise.
Thou who did once, while wondering worlds adored,
Bear thy Creator, Virgin then as now,
O by thy holy joy at Gabriel's word,
Pity the sinners who before thee bow.
Amen.

O God, Who through blessed John Capistrano
did enable Thy faithful people
to triumph over the enemies of the Cross
by the power of the most holy Name of Jesus:
grant, we beseech Thee,
that by his merits and intercession
we may overcome the snares of our malicious
and spiritual enemies,
keep Thy Church in perpetual peace,
grant us the special graces we now implore:

[Mention you special intentions]

And may we be found worthy to receive from Thee
the crown of justice.
Through Christ our Lord.
Amen

Reproduced from https://traditionalcatholicprayers.com/2017/10/23/prayer-to-st-john-capistrano/#