Robert Traill (The Throne of Grace), Works 1:129:
Whoever is made partaker of God’s special saving mercy, it shall never be taken from him. It shall never waste, nor spend, nor wear out; but shall stay with him, follow him, and grow up with him to eternity. The burden of that heaven-like song, Ps. 136, is six and twenty times repeated: For his mercy endureth for ever. How sweetly will it be sung from all the mansions in heaven, and by all the blessed dwellers in them! O give thanks to our God; for he is good, for his mercy endureth for ever. Can you learn this song? as the word is, Rev. 14:3. Only the redeemed of the Lord can say so; but all they should say so, Ps. 107:1, 2. His mercy is most sweet; a crumb of it will save a starving soul, as Matt. 15:27. A large measure of it on earth, is a heaven. But the eternity of this mercy, is the mercy of this mercy. Time-mercies in regard of this, are no mercies.