John Trapp on Psalms 30:4

Verſ. 4. Sing unto the Lord] Here he calleth in help to praiſe God, as holding himſelf too weak to do it a lone. Publication of Gods praiſes ſhould be ſeconded by provocation of others to do the like. David thought one mouth too little to do it.

O yee Saints of his] Or,Chafid. Plus, Benignus. O yee his mercifull ones, that having partaken of his mercy, are ready to impart the ſame to others; and not to pull up that bridge before them, that your ſelves have once gone over.

At the Remembrance (or memorial) of his holineſſe] That is, at his Tabernacle, ſay ſome; that his holineffe, his grace and goodneffe may be alwaies had in remembrance, ſay others; and that which he doth for us be carefully kept upon record.