John Gill Commentary Psalms 69:31

"And it will please Jehovah better than an ox, [Or] a bullock that hath horns and hoofs." — Psalms 69:31 (ASV)

[This] also shall please the Lord
That is, this song of praise and thanksgiving. The Targum has it, ``my prayers;'' as if it retorted to (Psalms 69:29); but what is expressed in (Psalms 69:30) seems to be the proper antecedent to this, and which is a sacrifice; see (Psalms 50:14) (Hebrews 13:15); and more acceptable to God than any of the legal sacrifices, even when they were in force; and much more, now they are abrogated; and especially as offered up by the Messiah himself, all whose offerings are well pleasing to God; particularly the offering up of himself, which was for a sweet smelling savour to him, and in virtue of which all spiritual sacrifices of prayer and praise become acceptable unto God.

better than an ox [or] bullock that has horns and hoofs ;
that is, than the best of legal sacrifices; as an ox or bullock was, whose horns and hoofs were grown; one of three years old, as Jarchi and Kimchi observe: the words may be literally rendered, "than an ox, than a bullock, than horns, than hoofs"; not only better than an ox or a bullock, but than any creature that has horns and hoofs; that is, than the lawful sacrifice of any animal whatever, as Junius renders and explains it.