Now therefore let it please thee to bless the house of thy servant, that it may be before thee for ever: for thou blessest, O LORD, and it shall be blessed for ever.

And thou hast begun to bless the house of thy servant, that it may be always before thee: for seeing thou blessest it, O Lord, it shall be blessed for ever.

and now, let it please thee to bless the house of thy servant, that it may be before thee for ever; for thou, Jehovah, hast blessed it, and it shall be blessed for ever.

and now, Thou hast been pleased to bless the house of Thy servant, to be to the age before Thee; for Thou, O Jehovah, hast blessed, and it is blessed to the age.'

Now therefore let it please you to bless the house of your servant, that it may be before you for ever: for you bless, O LORD, and it shall be blessed for ever.

And now you have been pleased to give your blessing to the family of your servant, so that it may go on for ever before you; you, O Lord, have given your blessing, and a blessing will be on it for ever.

and now it hath pleased Thee to bless the house of Thy servant, that it may continue for ever before Thee; for Thou, O LORD, hast blessed, and so let Thy servant be blessed for ever.'

And you have begun to bless the house of your servant, so that it may be always before you. For since it is you who is blessing, O Lord, it shall be blessed forever."

The marginal rendering is preferable.

For thou blessest, O Lord - "Thou beginnest to bless the house of thy servant, therefore it shall be blessed for ever." - T.
The reader is requested to refer to 2 Samuel 7 (note), and the notes there for many particulars that belong to the parallel places here, and which it should answer no good purpose to repeat in this place.

Blessed for ever - David's prayer concludes, as God's promise did, 1-Chronicles 17:14, with that which is for ever. God's word looks at things eternal. And so should our desires and hopes.