Prayer of St. John of Damascus which is to be said pointing at your bed:
O Lord Jesus Christ, Lover of mankind, is this bed to be my grave, or will you shine upon my wretched soul with the light of another day? Behold the grave lies before me and death confronts me: I fear Your
judgment, O Lord, and the eternal torments, but still I do not cease from my evil ways, continually angering You, my Lord God, together with Your immaculate Mother, all the Heavenly Hosts, and my holy Guardian Angel. I know, O Lord, that I am unworthy of Your love for
mankind and that I deserve every condemnation and torment; but I implore You, O Lord, save me according to the abundance of Your goodness; for it is no great deed if You grant salvation to the righteous, nor is it a miracle for You to have mercy on those who are pure,for they deserve Your lovingkindness. But work the wonder of Your mercy on me, a sinner, and thus reveal Your love for mankind, that my wickedness may not prevail over Your unspeakable goodness and mercy. Order my life as You will. Amen.
And when about to lie down on your bed, make the Sign of the Cross over it and say:
Let God arise, let His enemies be scattered, let those who hate Him flee from before His Face. As smoke vanishes, so let them vanish; as wax melts before the fire, so let the demons perish before those who love God and sign themselves with the Sign of the Cross, saying with joy: Rejoice, most precious and life-creating Cross of the Lord; you cast out demons by the might of Him who was crucified on you, our Lord Jesus Christ, who descended into hell and trampled on the power of the devil and gave you, His honourable Cross, to us, to banish all our enemies. Help me, O glorious and life-creating Cross of the Lord, together with the holy Lady Theotokos and all the saints, unto all ages. Amen.
As you give yourself up to sleep, say: Into Your hands, O Lord Jesus Christ my God, I commend my spirit: bless me, have mercy on me and grant me eternal life. Amen.