Acts 20:29φειδόμενοι
I know that after my departure, savage wolves will come in among you and will not spare the flock.
Romans 8:32ἐφείσατο
He who did not spare His own Son but gave Him up for us all, how will He not also, along with Him, freely give us all things?
1 Corinthians 7:28φείδομαι¶
But if you do marry, you have not sinned. And if a virgin marries, she has not sinned. But those who marry will face troubles in this life, and I want to spare you this.
2 Corinthians 1:23φειδόμενος
I call God as my witness that it was in order to spare you that I did not return to Corinth.
2 Peter 2:4ἐφείσατο
For if God did not spare the angels when they sinned, but cast them deep into hell, placing them in chains of darkness to be held for judgment;

Abbott-Smith

φείδομαι
[in LXX for חָמַל, חוּס, חָשַׂךְ, etc. ;]
to spare: 2Co.13:2; with genitive of person(s), Act.20:29, Rom.8:32 11:21, 1Co.7:28, 2Co.1:23, 2Pe.2:4-5; with inf., to forbear, 2Co.12:6.†
(AS)

Sources: Abbott-Smith’s Manual Greek Lexicon of the New Testament (1922, public domain) and glosses from STEPBible TBESG (CC BY 4.0); STEPBible TAGNT (Greek New Testament, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.