John Gill Commentary John 19:27

"Then saith he to the disciple, Behold, thy mother! And from that hour the disciple took her unto his own [home]." — John 19:27 (ASV)

Then says he to the disciple
The same disciple John:

behold your mother ;
take care of her, and provide for her, as if she was your own mother: this shows the meanness of Christ, who had nothing to leave her, though Lord of all; it is very probable that Joseph was dead, and Mary now a widow; and whereas Christ had taken care of her, and maintained her hitherto, he now, in his dying moments, commits her to the care of this disciple; which is an instance of his humanity, and of his regard to every duty; and this in particular, of honouring parents, and providing for them in distress, and old age:

and hour that disciple took her to his own home :
or house; so the Septuagint render (wtyb) , "to his house", by (eiv ta idia) , in (Esther 6:12) the phrase here used, and in (John 16:32) . Some say she lived with John at Jerusalem, and there died; and others say, that she died in the twelfth year after the resurrection of Christ, being 59 years of age, and was buried by John in the garden of Gethsemane:

where his house was is not certain, whether at Jerusalem or in Galilee, nor how long she lived with him; but this is not to be doubted, that he took care of her, and provided for her, as if she was his own mother; and his doing this forthwith shows his great regard to Christ, his readiness and cheerfulness to comply with his orders and directions, and his unfeigned love unto him.