Now when Daniel knew that the document was signed, he went into his house (now in his roof chamber his windows were open toward Jerusalem); he continued to get down on his knees three times a day, praying and giving thanks before his God, as he had been doing previously.

Early in the morning, while it was still dark, Jesus got up, left [the house], and went out to a secluded place, and was praying there.

And after He said goodbye to them, He went to the mountain to pray.

Now Jesus was telling the disciples a parable to make the point that at all times they ought to pray and not give up and lose heart,

Now Peter and John were going up to the temple at the hour of prayer, the ninth hour (3:00 p.m.),

About the ninth hour (3:00 p.m.) of the day he clearly saw in a vision an angel of God who had come to him and said, “Cornelius!”

With all prayer and petition pray [with specific requests] at all times [on every occasion and in every season] in the Spirit, and with this in view, stay alert with all perseverance and petition [interceding in prayer] for all God’s people.

be unceasing and persistent in prayer;

Cry

“Behold, I cry out, ‘Violence!’ but I am not heard;
I shout for help, but there is no justice.

Even when I cry out and shout for help,
He shuts out my prayer.

In the days of His earthly life, Jesus offered up both [specific] petitions and [urgent] supplications [for that which He needed] with fervent crying and tears to the One who was [always] able to save Him from death, and He was heard because of His reverent submission toward God [His sinlessness and His unfailing determination to do the Father’s will].

General references

In the morning, O Lord, You will hear my voice;
In the morning I will prepare [a prayer and a sacrifice] for You and watch and wait [for You to speak to my heart].

In the day of my trouble I will call upon You,
For You will answer me.