'Petition' in the Bible

But the angel said to him, “Do not be afraid, Zacharias, because your petition [in prayer] was heard, and your wife Elizabeth will bear you a son, and you will name him John.

Then they said to Him, “The disciples of John [the Baptist] often practice fasting and offer prayers [of special petition], and so do the disciples of the Pharisees; but Yours eat and drink.”

always offering every prayer of mine with joy [and with specific requests] for all of you,

Do not be anxious or worried about anything, but in everything [every circumstance and situation] by prayer and petition with thanksgiving, continue to make your [specific] requests known to God.

Therefore He is able also to save forever (completely, perfectly, for eternity) those who come to God through Him, since He always lives to intercede and intervene on their behalf [with God].