Are we responsible in other people’s sins if we don’t tell them to ask for forgiveness? Anyone has scripture to back this up?
As a believer, one that knows the Word, yes.
'Yet if thou warn the wicked, and he turn NOT from his wickedness, NOR from his wicked way, he shall die in his iniquity; but thou hast delivered thy soul. Again, When a righteous man doth turn from his righteousness, and commit iniquity, and I lay a stumblingblock before him, he shall die: because thou hast NOT given him warning, he shall die in his sin, and his righteousness which he hath done shall NOT be remembered; but his blood will I require at thine hand. Nevertheless if thou warn the righteous man, that the righteous sin not, and he doth NOT sin, he shall surely live, because he is warned; also you hast delivered your soul. ' Ezekiel 3:19-21