Verses with the word supplications in the New Testament (3 verses):

1 Timothy 2:1
I exhort therefore, that, first of all, supplications, prayers, intercessions, and giving of thanks, be made for all men;

1 Timothy 5:5
Now she that is a widow indeed, and desolate, trusteth in God, and continueth in supplications and prayers night and day.

Hebrews 5:7
Who in the days of his flesh, when he had offered up prayers and supplications with strong crying and tears unto him that was able to save him from death, and was heard in that he feared;