'Supplication' in the Bible

In the same way the Spirit [comes to us and] helps us in our weakness. We do not know what prayer to offer or how to offer it as we should, but the Spirit Himself [knows our need and at the right time] intercedes on our behalf with sighs and groanings too deep for words.

Brethren, the pleasure indeed of my heart, and my supplication that is to God for Israel, is -- for salvation;