1 Peter 3:7:

Likewise, ye husbands, dwell with them according to knowledge, giving honour unto the wife, as unto the weaker vessel, and as being heirs together of the grace of life; that your prayers be not hindered.

See also:

Is It Possible for a New Testament Believer’s Prayer to Receive Healing to Be Hindered?
Does Teaching That There Are Hindrances Hinder People from Getting Healed?
Does God Withhold Your Healing If You Don’t Forgive Others?
Objection: Hebrews 11:39 Proves That You Can Have Faith and NOT Receive the Promises
Objection: Sometimes God Says, “Yes,” Sometimes He Says “No,” and Sometimes He Says, “Wait” When You Ask for Healing
Mistake: Strife