2 Samuel 24:24
And the king said unto Araunah, Nay; but I will surely buy it of thee at a price: neither will I offer burnt offerings unto the LORD my God of that which doth cost me nothing. So David bought the threshingfloor and the oxen for fifty shekels of silver.
A Random Prayer...
Prayer Before Mass
Receive, O Holy Trinity, One God, this Holy Sacrifice of the Body and Blood of our Lord Jesus Christ, which I, Your unworthy servant, desire now to offer to Your Divine Majesty by the hands of this Your minister, with all the Sacrifices which have ever been or will be offered to You, in union with that most Holy Sacrifice offered by the same Christ our Lord at the Last Supper, and on the Altar of the Cross. I offer it to You with the utmost affection of devotion, out of pure love for Your infinite goodness, and according to the most holy intention of the same Christ our Lord, and of our Holy Mother the Church. O God, almighty and merciful, grant us through this Holy Sacrifice, joy and peace, a holier life, time to do penance, grace and consolation of the Holy Spirit, and perseverance in good works. Amen.
more prayers...