persevering

3 occurrences across the corpus

Apostolic Fathers

Epistle of Polycarp to the Philippians 7:1

For whosoever does not confess that Jesus Christ has come in the flesh, is antichrist;” and whosoever does not confess the testimony of the cross, is of the devil; and whosoever perverts the oracles of the Lord to his own lusts, and says that there is neither a resurrection nor a judgment, he is the first-born of Satan. Wherefore, forsaking the vanity of many, and their false doctrines, let us return to the word which has been handed down to us from the beginning; “watching unto prayer,” and persevering in fasting; beseeching in our supplications the all-seeing Godnot to lead us into temptation,” as the Lord has said: “The spirit truly is willing, but the flesh is weak.”

Ethiopian Orthodox Broader Canon

Testament of Our Lord, Book I 16:1

Then Martha and Mary, and Salome, who were with us,‘ answered and said:—Yea, O our Lord, teach us to know what we ought to do, that our souls may live unto Thee. Then Jesus answered and said unto them: I will that, persevering in supplication,’ ye should always serve My Gospel, and be examples of holiness, for the salvation of those who trust patientlyin Me; and in all things be figures of the kingdom of heaven.

Testament of Our Lord, Book II 3:1

Let him who is instructed with all care and heareth the perfectness of the Gospel, be instructed not less than three years, and if he, loving, strive to be baptized, let him [then] be baptized.: But if he be quiet and meek and earnest, and persevering and abiding with him who teacheth him, with labour, with watching, with confession, with subjection, and with prayers, and [if] he desire to be baptized sooner, let him be baptized. For it is not the time that is considered, but the will of faith.”