Catholics believe that there are bad, man-made traditions (e.g., Sola Scriptura) and good Apostolic traditions.
Below are biblical commendations of Apostolic Tradition:
"I commend you because you remember me in everything and maintain the traditions even as I have delivered them to you"(1 Cor. 11:2)"So then, brethren, stand firm and hold to the traditions which you were taught by us, either by word of mouth or by letter" (2 Thess. 2:15)
"Now we command you, brethren, in the name of our Lord Jesus Christ, that you keep away from any brother who is living in idleness and not in accord with the tradition that you received from us" (2 Thess. 3:6).
"Go and make disciples of all the nations, baptizing them in the name of the Father, Son and Holy Spirit, and teaching them everything I have commanded you." --Jesus (Mat 28:19)
"Take as a model of sound teaching what you have heard me say, in faith and love in Christ Jesus. Guard the rich deposit of faith with the help of the Holy Spirit who dwells within us" (2 Tim 1:13-14)
"You then, my son, be strong in the grace that is in Christ Jesus, and what you have heard from me before many witnesses entrust to faithful men who will be able to teach others also" (2 Tim 2:1-2)